diff --git a/NuGet.config b/NuGet.config
index 6d6ac8b3..feea2892 100644
--- a/NuGet.config
+++ b/NuGet.config
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <packageSources>
     <clear />
diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index bdf33567..2ab1eacc 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Dependencies>
   <ToolsetDependencies>
-    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="5.0.0-beta.19480.3">
+    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="5.0.0-beta.19531.2">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>96e8fc12aa98264c4e1980252e962b908eaae956</Sha>
+      <Sha>5861e349e8fc9b357c2dc70a847be9870f09f5a2</Sha>
     </Dependency>
   </ToolsetDependencies>
 </Dependencies>
diff --git a/eng/Versions.props b/eng/Versions.props
index d12af4d2..ed130589 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -5,7 +5,6 @@
     <UsingToolXliff>false</UsingToolXliff>
     <UsingToolNetFrameworkReferenceAssemblies>true</UsingToolNetFrameworkReferenceAssemblies>
   </PropertyGroup>
-  
   <!-- Production Dependencies -->
   <PropertyGroup>
     <MicrosoftBuildFrameworkPackageVersion>$(MicrosoftBuildPackageVersion)</MicrosoftBuildFrameworkPackageVersion>
@@ -13,12 +12,10 @@
     <MicrosoftBuildUtilitiesCorePackageVersion>$(MicrosoftBuildPackageVersion)</MicrosoftBuildUtilitiesCorePackageVersion>
     <!-- Ref packages -->
   </PropertyGroup>
-
   <PropertyGroup>
     <VersionPrefix>3.1.0</VersionPrefix>
     <PreReleaseVersionLabel>rc1</PreReleaseVersionLabel>
   </PropertyGroup>
-
   <PropertyGroup>
     <RestoreSources>
       $(RestoreSources);
@@ -29,134 +26,94 @@
       https://dotnet.myget.org/F/dotnet-web/api/v3/index.json
     </RestoreSources>
   </PropertyGroup>
-
   <PropertyGroup>
     <!-- adding packages from old dependencies.prop file-->
     <MicrosoftCodeAnalysisCSharpWorkspacesPackageVersion>3.3.0</MicrosoftCodeAnalysisCSharpWorkspacesPackageVersion>
     <!-- Microsoft.AspNetCore.Razor.Language -->
     <MicrosoftAspNetCoreRazorLanguagePackageVersion>3.1.0-preview1.19508.6</MicrosoftAspNetCoreRazorLanguagePackageVersion>
-
     <!-- Microsoft.AspNetCore.Razor.Runtime -->
     <MicrosoftAspNetCoreRazorRuntimePackageVersion>2.2.0</MicrosoftAspNetCoreRazorRuntimePackageVersion>
-
     <MicrosoftBuildPackageVersion>15.6.82</MicrosoftBuildPackageVersion>
     <MicrosoftBuildUtilitiesCorePackageVersion>15.6.82</MicrosoftBuildUtilitiesCorePackageVersion>
-
     <!-- Microsoft.CodeAnalysis.CSharp -->
     <MicrosoftCodeAnalysisCSharpPackageVersion>3.4.0-beta2-19477-01</MicrosoftCodeAnalysisCSharpPackageVersion>
-
     <!-- Microsoft.CodeAnalysis.Razor -->
     <MicrosoftCodeAnalysisRazorPackageVersion>3.1.0-preview1.19508.6</MicrosoftCodeAnalysisRazorPackageVersion>
-
     <!-- Microsoft.CodeAnalysis.CSharp.Workspaces -->
     <MicrosoftCodeAnalysisCSharpWorkspacesPackageVersion>3.4.0-beta2-19477-01</MicrosoftCodeAnalysisCSharpWorkspacesPackageVersion>
-
     <!-- Microsoft.Extensions.CommandLineUtils.Sources -->
     <!-- from aspnetcore-dev	-->
     <MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>3.0.0-preview6.19253.5</MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>
-
     <!-- Microsoft.EntityFrameworkCore.Design -->
     <MicrosoftEntityFrameworkCoreDesignPackageVersion>3.0.0-preview6.19304.10</MicrosoftEntityFrameworkCoreDesignPackageVersion>
-
     <!-- Microsoft.Extensions.DependencyInjection -->
     <MicrosoftExtensionsDependencyInjectionPackageVersion>3.1.0-preview1.19506.1</MicrosoftExtensionsDependencyInjectionPackageVersion>
-
     <!-- Microsoft.Extensions.FileProviders.Physical -->
     <MicrosoftExtensionsFileProvidersPhysicalPackageVersion>3.1.0-preview1.19506.1</MicrosoftExtensionsFileProvidersPhysicalPackageVersion>
-
     <NewtonsoftJsonPackageVersion>11.0.2</NewtonsoftJsonPackageVersion>
     <NuGetFrameworksPackageVersion>4.7.0</NuGetFrameworksPackageVersion>
     <VisualStudio_NewtonsoftJsonPackageVersion>9.0.1</VisualStudio_NewtonsoftJsonPackageVersion>
     <SystemCollectionsImmutablePackageVersion>1.6.0</SystemCollectionsImmutablePackageVersion>
-
-<!-- Everything below here are Packages only used by test projects -->
-
+    <!-- Everything below here are Packages only used by test projects -->
     <!-- Microsoft.AspNetCore.Hosting -->
     <MicrosoftAspNetCoreHostingPackageVersion>3.0.0-preview4-19123-01</MicrosoftAspNetCoreHostingPackageVersion>
-
     <!-- Microsoft.AspNetCore.Server.Kestrel -->
     <MicrosoftAspNetCoreServerKestrelPackageVersion>3.0.0-preview4-19123-01</MicrosoftAspNetCoreServerKestrelPackageVersion>
     <!-- Microsoft.AspNetCore.Server.IISIntegration -->
     <MicrosoftAspNetCoreServerIISIntegrationPackageVersion>3.0.0-preview4-19123-01</MicrosoftAspNetCoreServerIISIntegrationPackageVersion>
-
     <!-- Microsoft.ApplicationInsights.AspNetCore -->
     <MicrosoftApplicationInsightsAspNetCorePackageVersion>2.6.1</MicrosoftApplicationInsightsAspNetCorePackageVersion>
-
     <!-- Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore -->
     <MicrosoftAspNetCoreDiagnosticsEntityFrameworkCorePackageVersion>3.0.0-preview5-19227-01</MicrosoftAspNetCoreDiagnosticsEntityFrameworkCorePackageVersion>
-
     <!-- Microsoft.AspNetCore.Identity.EntityFrameworkCore -->
     <MicrosoftAspNetCoreIdentityEntityFrameworkCorePackageVersion>3.0.0-preview5-19227-01</MicrosoftAspNetCoreIdentityEntityFrameworkCorePackageVersion>
-
     <!-- Microsoft.AspNetCore.Identity.UI -->
     <MicrosoftAspNetCoreIdentityUIPackageVersion>3.0.0</MicrosoftAspNetCoreIdentityUIPackageVersion>
-
     <!-- Microsoft.Extensions.Identity.Stores -->
     <MicrosoftExtensionsIdentityStoresPackageVersion>3.0.0</MicrosoftExtensionsIdentityStoresPackageVersion>
-
     <!-- Microsoft.AspNetCore -->
     <!-- this is from aspnetcore-dev (test project only) -->
     <MicrosoftAspNetCorePackageVersion>3.0.0-alpha1-10584</MicrosoftAspNetCorePackageVersion>
-
     <MicrosoftBuildRuntimePackageVersion>15.6.82</MicrosoftBuildRuntimePackageVersion>
-
     <!-- Microsoft.AspNetCore.Mvc -->
     <!-- this is from aspnetcore-dev (test only) -->
     <MicrosoftAspNetCoreMvcPackageVersion>3.0.0-alpha1-10584</MicrosoftAspNetCoreMvcPackageVersion>
-
     <!-- Microsoft.AspNetCore.Authentication.Cookies -->
     <!-- this is from aspnetcore-dev (test only) -->
     <MicrosoftAspNetCoreAuthenticationCookiesPackageVersion>3.0.0-alpha1-10584</MicrosoftAspNetCoreAuthenticationCookiesPackageVersion>
-
     <!-- Microsoft.AspNetCore.StaticFiles -->
     <!-- this is from aspnetcore-dev (test only) -->
     <MicrosoftAspNetCoreStaticFilesPackageVersion>3.0.0-alpha1-10584</MicrosoftAspNetCoreStaticFilesPackageVersion>
-
     <!-- Microsoft.DotNet.ProjectModel -->
     <MicrosoftDotNetProjectModelPackageVersion>1.0.0-rc3-003121</MicrosoftDotNetProjectModelPackageVersion>
-
     <!-- Microsoft.EntityFrameworkCore -->
     <MicrosoftEntityFrameworkCorePackageVersion>3.0.0-preview6.19304.10</MicrosoftEntityFrameworkCorePackageVersion>
-
     <!-- Microsoft.EntityFrameworkCore.SqlServer -->
     <MicrosoftEntityFrameworkCoreSqlServerPackageVersion>3.0.0-preview5.19227.1</MicrosoftEntityFrameworkCoreSqlServerPackageVersion>
-
     <!-- Microsoft.Extensions.Configuration.Abstractions -->
     <MicrosoftExtensionsConfigurationAbstractionsPackageVersion>3.1.0-preview1.19506.1</MicrosoftExtensionsConfigurationAbstractionsPackageVersion>
-
     <!-- Microsoft.Extensions.Configuration.EnvironmentVariables -->
     <MicrosoftExtensionsConfigurationEnvironmentVariablesPackageVersion>3.1.0-preview1.19506.1</MicrosoftExtensionsConfigurationEnvironmentVariablesPackageVersion>
-
     <!-- Microsoft.Extensions.Configuration.Json -->
     <MicrosoftExtensionsConfigurationJsonPackageVersion>3.1.0-preview1.19506.1</MicrosoftExtensionsConfigurationJsonPackageVersion>
-
     <!-- Microsoft.Extensions.Configuration.UserSecrets -->
     <MicrosoftExtensionsConfigurationUserSecretsPackageVersion>3.1.0-preview1.19506.1</MicrosoftExtensionsConfigurationUserSecretsPackageVersion>
-    
     <!--Microsoft.Extensions.DependencyModel -->
     <MicrosoftExtensionsDependencyModelPackageVersion>3.0.0</MicrosoftExtensionsDependencyModelPackageVersion>
-    
     <!-- Microsoft.Extensions.FileProviders.Embedded -->
     <MicrosoftExtensionsFileProvidersEmbeddedPackageVersion>3.1.0-preview1.19506.1</MicrosoftExtensionsFileProvidersEmbeddedPackageVersion>
-
     <!-- Microsoft.Extensions.Logging.Console -->
     <MicrosoftExtensionsLoggingConsolePackageVersion>3.1.0-preview1.19506.1</MicrosoftExtensionsLoggingConsolePackageVersion>
-
     <!-- Microsoft.Extensions.Logging.Debug -->
     <MicrosoftExtensionsLoggingDebugPackageVersion>3.1.0-preview1.19506.1</MicrosoftExtensionsLoggingDebugPackageVersion>
-
     <!-- Microsoft.Extensions.Logging -->
     <MicrosoftExtensionsLoggingPackageVersion>3.1.0-preview1.19506.1</MicrosoftExtensionsLoggingPackageVersion>
-
     <!-- Microsoft.Extensions.Options.ConfigurationExtensions -->
     <MicrosoftExtensionsOptionsConfigurationExtensionsPackageVersion>3.1.0-preview1.19506.1</MicrosoftExtensionsOptionsConfigurationExtensionsPackageVersion>
-
     <!-- Microsoft.NET.Sdk.Razor -->
     <MicrosoftNETSdkRazorPackageVersion>3.0.0-preview5.19227.1</MicrosoftNETSdkRazorPackageVersion>
-
     <!-- Microsoft.NET.Test.Sdk-->
     <MicrosoftNETTestSdkPackageVersion>15.6.1</MicrosoftNETTestSdkPackageVersion>
-
     <MoqPackageVersion>4.9.0</MoqPackageVersion>
     <NETStandardLibrary20PackageVersion>2.0.3</NETStandardLibrary20PackageVersion>
     <XunitPackageVersion>2.4.1</XunitPackageVersion>
diff --git a/eng/common/PublishToSymbolServers.proj b/eng/common/PublishToSymbolServers.proj
index 5d55e312..311e2bbe 100644
--- a/eng/common/PublishToSymbolServers.proj
+++ b/eng/common/PublishToSymbolServers.proj
@@ -37,6 +37,8 @@
     <PropertyGroup>
       <DotNetSymbolExpirationInDays Condition="'$(DotNetSymbolExpirationInDays)' == ''">3650</DotNetSymbolExpirationInDays>
       <PublishToSymbolServer>true</PublishToSymbolServer>
+      <PublishToSymWeb Condition="'$(PublishToSymWeb)' == ''">true</PublishToSymWeb>
+      <PublishToMSDL Condition="'$(PublishToMSDL)' == ''">true</PublishToMSDL>
       <PublishToSymbolServer Condition="'@(FilesToPublishToSymbolServer)' == '' and '@(PackagesToPublishToSymbolServer)' == ''">false</PublishToSymbolServer>
     </PropertyGroup>
 
@@ -56,7 +58,7 @@
                     DryRun="false"
                     ConvertPortablePdbsToWindowsPdbs="false"
                     PdbConversionTreatAsWarning=""
-                    Condition="$(PublishToSymbolServer)"/>
+                    Condition="$(PublishToSymbolServer) and $(PublishToMSDL)"/>
 
     <!-- 
       Symbol Uploader: SymWeb 
@@ -73,7 +75,7 @@
                     DryRun="false"
                     ConvertPortablePdbsToWindowsPdbs="false"
                     PdbConversionTreatAsWarning=""
-                    Condition="$(PublishToSymbolServer)"/>
+                    Condition="$(PublishToSymbolServer) and $(PublishToSymWeb)"/>
   </Target>
 
   <ItemGroup>
diff --git a/eng/common/build.ps1 b/eng/common/build.ps1
index e001ccb4..55dff332 100644
--- a/eng/common/build.ps1
+++ b/eng/common/build.ps1
@@ -18,6 +18,7 @@ Param(
   [switch] $sign,
   [switch] $pack,
   [switch] $publish,
+  [switch] $clean,
   [switch][Alias('bl')]$binaryLog,
   [switch] $ci,
   [switch] $prepareMachine,
@@ -48,6 +49,7 @@ function Print-Usage() {
     Write-Host "  -pack                   Package build outputs into NuGet packages and Willow components"
     Write-Host "  -sign                   Sign build outputs"
     Write-Host "  -publish                Publish artifacts (e.g. symbols)"
+    Write-Host "  -clean                  Clean the solution"
     Write-Host ""
 
     Write-Host "Advanced settings:"
@@ -112,6 +114,14 @@ function Build {
     @properties
 }
 
+if ($clean) {
+  if(Test-Path $ArtifactsDir) {
+    Remove-Item -Recurse -Force $ArtifactsDir
+    Write-Host "Artifacts directory deleted."
+  }
+  exit 0
+}
+
 try {
   if ($help -or (($null -ne $properties) -and ($properties.Contains("/help") -or $properties.Contains("/?")))) {
     Print-Usage
@@ -123,14 +133,7 @@ try {
     $nodeReuse = $false
   }
 
-  # Import custom tools configuration, if present in the repo.
-  # Note: Import in global scope so that the script set top-level variables without qualification.
-  $configureToolsetScript = Join-Path $EngRoot "configure-toolset.ps1"
-  if (Test-Path $configureToolsetScript) {
-    . $configureToolsetScript
-  }
-
-  if (($restore) -and ($null -eq $env:DisableNativeToolsetInstalls)) {
+  if ($restore) {
     InitializeNativeTools
   }
 
diff --git a/eng/common/build.sh b/eng/common/build.sh
index 6236fc4d..36f9aa04 100644
--- a/eng/common/build.sh
+++ b/eng/common/build.sh
@@ -26,6 +26,7 @@ usage()
   echo "  --pack                     Package build outputs into NuGet packages and Willow components"
   echo "  --sign                     Sign build outputs"
   echo "  --publish                  Publish artifacts (e.g. symbols)"
+  echo "  --clean                    Clean the solution"
   echo ""
 
   echo "Advanced settings:"
@@ -62,6 +63,7 @@ publish=false
 sign=false
 public=false
 ci=false
+clean=false
 
 warn_as_error=true
 node_reuse=true
@@ -82,6 +84,9 @@ while [[ $# > 0 ]]; do
       usage
       exit 0
       ;;
+    -clean)
+      clean=true
+      ;;
     -configuration|-c)
       configuration=$2
       shift
@@ -196,20 +201,15 @@ function Build {
   ExitWithExitCode 0
 }
 
-# Import custom tools configuration, if present in the repo.
-configure_toolset_script="$eng_root/configure-toolset.sh"
-if [[ -a "$configure_toolset_script" ]]; then
-  . "$configure_toolset_script"
+if [[ "$clean" == true ]]; then
+  if [ -d "$artifacts_dir" ]; then
+    rm -rf $artifacts_dir
+    echo "Artifacts directory deleted."
+  fi
+  exit 0
 fi
 
-# TODO: https://github.com/dotnet/arcade/issues/1468
-# Temporary workaround to avoid breaking change.
-# Remove once repos are updated.
-if [[ -n "${useInstalledDotNetCli:-}" ]]; then
-  use_installed_dotnet_cli="$useInstalledDotNetCli"
-fi
-
-if [[ "$restore" == true && -z ${DisableNativeToolsetInstalls:-} ]]; then
+if [[ "$restore" == true ]]; then
   InitializeNativeTools
 fi
 
diff --git a/eng/common/darc-init.ps1 b/eng/common/darc-init.ps1
index 46d175fd..5d7eaa5f 100644
--- a/eng/common/darc-init.ps1
+++ b/eng/common/darc-init.ps1
@@ -1,7 +1,8 @@
 param (
     $darcVersion = $null,
     $versionEndpoint = "https://maestro-prod.westus2.cloudapp.azure.com/api/assets/darc-version?api-version=2019-01-16",
-    $verbosity = "m"
+    $verbosity = "m",
+    $toolpath = $null
 )
 
 . $PSScriptRoot\tools.ps1
@@ -23,11 +24,15 @@ function InstallDarcCli ($darcVersion) {
     $darcVersion = $(Invoke-WebRequest -Uri $versionEndpoint -UseBasicParsing).Content
   }
 
-  $arcadeServicesSource = 'https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json'
+  $arcadeServicesSource = 'https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json'
 
   Write-Host "Installing Darc CLI version $darcVersion..."
   Write-Host "You may need to restart your command window if this is the first dotnet tool you have installed."
-  & "$dotnet" tool install $darcCliPackageName --version $darcVersion --add-source "$arcadeServicesSource" -v $verbosity -g
+  if (-not $toolpath) {
+    & "$dotnet" tool install $darcCliPackageName --version $darcVersion --add-source "$arcadeServicesSource" -v $verbosity -g
+  }else {
+    & "$dotnet" tool install $darcCliPackageName --version $darcVersion --add-source "$arcadeServicesSource" -v $verbosity --tool-path "$toolpath"    
+  }
 }
 
 InstallDarcCli $darcVersion
diff --git a/eng/common/darc-init.sh b/eng/common/darc-init.sh
index 242429bc..82b2b576 100755
--- a/eng/common/darc-init.sh
+++ b/eng/common/darc-init.sh
@@ -20,6 +20,10 @@ while [[ $# > 0 ]]; do
       verbosity=$2
       shift
       ;;
+    --toolpath)
+      toolpath=$2
+      shift
+      ;;
     *)
       echo "Invalid argument: $1"
       usage
@@ -52,17 +56,27 @@ function InstallDarcCli {
   InitializeDotNetCli
   local dotnet_root=$_InitializeDotNetCli
 
-  local uninstall_command=`$dotnet_root/dotnet tool uninstall $darc_cli_package_name -g`
-  local tool_list=$($dotnet_root/dotnet tool list -g)
-  if [[ $tool_list = *$darc_cli_package_name* ]]; then
-    echo $($dotnet_root/dotnet tool uninstall $darc_cli_package_name -g)
+  if [ -z "$toolpath" ]; then
+    local tool_list=$($dotnet_root/dotnet tool list -g)
+    if [[ $tool_list = *$darc_cli_package_name* ]]; then
+      echo $($dotnet_root/dotnet tool uninstall $darc_cli_package_name -g)
+    fi
+  else
+    local tool_list=$($dotnet_root/dotnet tool list --tool-path "$toolpath")
+    if [[ $tool_list = *$darc_cli_package_name* ]]; then
+      echo $($dotnet_root/dotnet tool uninstall $darc_cli_package_name --tool-path "$toolpath")
+    fi
   fi
 
-  local arcadeServicesSource="https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json"
+  local arcadeServicesSource="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json"
 
   echo "Installing Darc CLI version $darcVersion..."
   echo "You may need to restart your command shell if this is the first dotnet tool you have installed."
-  echo $($dotnet_root/dotnet tool install $darc_cli_package_name --version $darcVersion --add-source "$arcadeServicesSource" -v $verbosity -g)
+  if [ -z "$toolpath" ]; then
+    echo $($dotnet_root/dotnet tool install $darc_cli_package_name --version $darcVersion --add-source "$arcadeServicesSource" -v $verbosity -g)
+  else
+    echo $($dotnet_root/dotnet tool install $darc_cli_package_name --version $darcVersion --add-source "$arcadeServicesSource" -v $verbosity --tool-path "$toolpath")
+  fi
 }
 
 InstallDarcCli
diff --git a/eng/common/dotnet-install.ps1 b/eng/common/dotnet-install.ps1
index 0b629b83..ec3e739f 100644
--- a/eng/common/dotnet-install.ps1
+++ b/eng/common/dotnet-install.ps1
@@ -3,7 +3,9 @@ Param(
   [string] $verbosity = "minimal",
   [string] $architecture = "",
   [string] $version = "Latest",
-  [string] $runtime = "dotnet"
+  [string] $runtime = "dotnet",
+  [string] $RuntimeSourceFeed = "",
+  [string] $RuntimeSourceFeedKey = ""
 )
 
 . $PSScriptRoot\tools.ps1
@@ -15,7 +17,7 @@ try {
     if ($architecture -and $architecture.Trim() -eq "x86") {
         $installdir = Join-Path $installdir "x86"
     }
-   InstallDotNet $installdir $version $architecture $runtime $true
+   InstallDotNet $installdir $version $architecture $runtime $true -RuntimeSourceFeed $RuntimeSourceFeed -RuntimeSourceFeedKey $RuntimeSourceFeedKey
 } 
 catch {
   Write-Host $_
diff --git a/eng/common/dotnet-install.sh b/eng/common/dotnet-install.sh
index c3072c95..94ea3438 100755
--- a/eng/common/dotnet-install.sh
+++ b/eng/common/dotnet-install.sh
@@ -14,6 +14,8 @@ scriptroot="$( cd -P "$( dirname "$source" )" && pwd )"
 version='Latest'
 architecture=''
 runtime='dotnet'
+runtimeSourceFeed=''
+runtimeSourceFeedKey=''
 while [[ $# > 0 ]]; do
   opt="$(echo "$1" | awk '{print tolower($0)}')"
   case "$opt" in
@@ -29,18 +31,55 @@ while [[ $# > 0 ]]; do
       shift
       runtime="$1"
       ;;
+    -runtimesourcefeed)
+      shift
+      runtimeSourceFeed="$1"
+      ;;
+    -runtimesourcefeedkey)
+      shift
+      runtimeSourceFeedKey="$1"
+      ;;
     *)
       echo "Invalid argument: $1"
-      usage
       exit 1
       ;;
   esac
   shift
 done
 
+# Use uname to determine what the CPU is.
+cpuname=$(uname -p)
+# Some Linux platforms report unknown for platform, but the arch for machine.
+if [[ "$cpuname" == "unknown" ]]; then
+  cpuname=$(uname -m)
+fi
+
+case $cpuname in
+  aarch64)
+    buildarch=arm64
+    ;;
+  amd64|x86_64)
+    buildarch=x64
+    ;;
+  armv7l)
+    buildarch=arm
+    ;;
+  i686)
+    buildarch=x86
+    ;;
+  *)
+    echo "Unknown CPU $cpuname detected, treating it as x64"
+    buildarch=x64
+    ;;
+esac
+
 . "$scriptroot/tools.sh"
 dotnetRoot="$repo_root/.dotnet"
-InstallDotNet $dotnetRoot $version "$architecture" $runtime true || {
+if [[ $architecture != "" ]] && [[ $architecture != $buildarch ]]; then
+  dotnetRoot="$dotnetRoot/$architecture"
+fi
+
+InstallDotNet $dotnetRoot $version "$architecture" $runtime true $runtimeSourceFeed $runtimeSourceFeedKey || {
   local exit_code=$?
   echo "dotnet-install.sh failed (exit code '$exit_code')." >&2
   ExitWithExitCode $exit_code
diff --git a/eng/common/init-tools-native.ps1 b/eng/common/init-tools-native.ps1
index 8cf18bcf..0fc0503a 100644
--- a/eng/common/init-tools-native.ps1
+++ b/eng/common/init-tools-native.ps1
@@ -133,6 +133,7 @@ try {
   if (Test-Path $InstallBin) {
     Write-Host "Native tools are available from" (Convert-Path -Path $InstallBin)
     Write-Host "##vso[task.prependpath]$(Convert-Path -Path $InstallBin)"
+    return $InstallBin
   }
   else {
     Write-Error "Native tools install directory does not exist, installation failed"
diff --git a/eng/common/post-build/post-build-utils.ps1 b/eng/common/post-build/post-build-utils.ps1
index 551ae113..aa9a025c 100644
--- a/eng/common/post-build/post-build-utils.ps1
+++ b/eng/common/post-build/post-build-utils.ps1
@@ -8,6 +8,7 @@ Set-StrictMode -Version 2.0
 # scripts don't necessarily execute in the same agent that run the
 # build.ps1/sh script this variable isn't automatically set.
 $ci = $true
+$disableConfigureToolsetImport = "true"
 . $PSScriptRoot\..\tools.ps1
 
 function Create-MaestroApiRequestHeaders([string]$ContentType = "application/json") {
diff --git a/eng/common/post-build/setup-maestro-vars.ps1 b/eng/common/post-build/setup-maestro-vars.ps1
deleted file mode 100644
index d7f64dc6..00000000
--- a/eng/common/post-build/setup-maestro-vars.ps1
+++ /dev/null
@@ -1,26 +0,0 @@
-param(
-  [Parameter(Mandatory=$true)][string] $ReleaseConfigsPath            # Full path to ReleaseConfigs.txt asset
-)
-
-. $PSScriptRoot\post-build-utils.ps1
-
-try {
-  $Content = Get-Content $ReleaseConfigsPath
-  
-  $BarId = $Content | Select -Index 0
-  
-  $Channels = ""            
-  $Content | Select -Index 1 | ForEach-Object { $Channels += "$_ ," }
-  
-  $IsStableBuild = $Content | Select -Index 2
-
-  Write-PipelineSetVariable -Name 'BARBuildId' -Value $BarId
-  Write-PipelineSetVariable -Name 'InitialChannels' -Value "$Channels"
-  Write-PipelineSetVariable -Name 'IsStableBuild' -Value $IsStableBuild
-}
-catch {
-  Write-Host $_
-  Write-Host $_.Exception
-  Write-Host $_.ScriptStackTrace
-  ExitWithExitCode 1
-}
diff --git a/eng/common/sdl/execute-all-sdl-tools.ps1 b/eng/common/sdl/execute-all-sdl-tools.ps1
index 01799d63..eb21321b 100644
--- a/eng/common/sdl/execute-all-sdl-tools.ps1
+++ b/eng/common/sdl/execute-all-sdl-tools.ps1
@@ -1,30 +1,30 @@
 Param(
-  [string] $GuardianPackageName,                                                           # Required: the name of guardian CLI package (not needed if GuardianCliLocation is specified)
-  [string] $NugetPackageDirectory,                                                         # Required: directory where NuGet packages are installed (not needed if GuardianCliLocation is specified)
-  [string] $GuardianCliLocation,                                                           # Optional: Direct location of Guardian CLI executable if GuardianPackageName & NugetPackageDirectory are not specified
-  [string] $Repository=$env:BUILD_REPOSITORY_NAME,                                         # Required: the name of the repository (e.g. dotnet/arcade)
-  [string] $BranchName=$env:BUILD_SOURCEBRANCH,                                            # Optional: name of branch or version of gdn settings; defaults to master
-  [string] $SourceDirectory=$env:BUILD_SOURCESDIRECTORY,                                   # Required: the directory where source files are located
-  [string] $ArtifactsDirectory = (Join-Path $env:BUILD_SOURCESDIRECTORY ("artifacts")),    # Required: the directory where build artifacts are located
-  [string] $AzureDevOpsAccessToken,                                                        # Required: access token for dnceng; should be provided via KeyVault
-  [string[]] $SourceToolsList,                                                             # Optional: list of SDL tools to run on source code
-  [string[]] $ArtifactToolsList,                                                           # Optional: list of SDL tools to run on built artifacts
-  [bool] $TsaPublish=$False,                                                               # Optional: true will publish results to TSA; only set to true after onboarding to TSA; TSA is the automated framework used to upload test results as bugs.
-  [string] $TsaBranchName=$env:BUILD_SOURCEBRANCH,                                         # Optional: required for TSA publish; defaults to $(Build.SourceBranchName); TSA is the automated framework used to upload test results as bugs.
-  [string] $TsaRepositoryName=$env:BUILD_REPOSITORY_NAME,                                  # Optional: TSA repository name; will be generated automatically if not submitted; TSA is the automated framework used to upload test results as bugs.
-  [string] $BuildNumber=$env:BUILD_BUILDNUMBER,                                            # Optional: required for TSA publish; defaults to $(Build.BuildNumber)
-  [bool] $UpdateBaseline=$False,                                                           # Optional: if true, will update the baseline in the repository; should only be run after fixing any issues which need to be fixed
-  [bool] $TsaOnboard=$False,                                                               # Optional: if true, will onboard the repository to TSA; should only be run once; TSA is the automated framework used to upload test results as bugs.
-  [string] $TsaInstanceUrl,                                                                # Optional: only needed if TsaOnboard or TsaPublish is true; the instance-url registered with TSA; TSA is the automated framework used to upload test results as bugs.
-  [string] $TsaCodebaseName,                                                               # Optional: only needed if TsaOnboard or TsaPublish is true; the name of the codebase registered with TSA; TSA is the automated framework used to upload test results as bugs.
-  [string] $TsaProjectName,                                                                # Optional: only needed if TsaOnboard or TsaPublish is true; the name of the project registered with TSA; TSA is the automated framework used to upload test results as bugs.
-  [string] $TsaNotificationEmail,                                                          # Optional: only needed if TsaOnboard is true; the email(s) which will receive notifications of TSA bug filings (e.g. alias@microsoft.com); TSA is the automated framework used to upload test results as bugs.
-  [string] $TsaCodebaseAdmin,                                                              # Optional: only needed if TsaOnboard is true; the aliases which are admins of the TSA codebase (e.g. DOMAIN\alias); TSA is the automated framework used to upload test results as bugs.
-  [string] $TsaBugAreaPath,                                                                # Optional: only needed if TsaOnboard is true; the area path where TSA will file bugs in AzDO; TSA is the automated framework used to upload test results as bugs.
-  [string] $TsaIterationPath,                                                              # Optional: only needed if TsaOnboard is true; the iteration path where TSA will file bugs in AzDO; TSA is the automated framework used to upload test results as bugs.
-  [string] $GuardianLoggerLevel="Standard",                                                # Optional: the logger level for the Guardian CLI; options are Trace, Verbose, Standard, Warning, and Error
-  [string[]] $CrScanAdditionalRunConfigParams,                                             # Optional: Additional Params to custom build a CredScan run config in the format @("xyz:abc","sdf:1")
-  [string[]] $PoliCheckAdditionalRunConfigParams                                           # Optional: Additional Params to custom build a Policheck run config in the format @("xyz:abc","sdf:1")
+  [string] $GuardianPackageName,                                                                 # Required: the name of guardian CLI package (not needed if GuardianCliLocation is specified)
+  [string] $NugetPackageDirectory,                                                               # Required: directory where NuGet packages are installed (not needed if GuardianCliLocation is specified)
+  [string] $GuardianCliLocation,                                                                 # Optional: Direct location of Guardian CLI executable if GuardianPackageName & NugetPackageDirectory are not specified
+  [string] $Repository=$env:BUILD_REPOSITORY_NAME,                                               # Required: the name of the repository (e.g. dotnet/arcade)
+  [string] $BranchName=$env:BUILD_SOURCEBRANCH,                                                  # Optional: name of branch or version of gdn settings; defaults to master
+  [string] $SourceDirectory=$env:BUILD_SOURCESDIRECTORY,                                         # Required: the directory where source files are located
+  [string] $ArtifactsDirectory = (Join-Path $env:BUILD_ARTIFACTSTAGINGDIRECTORY ("artifacts")),  # Required: the directory where build artifacts are located
+  [string] $AzureDevOpsAccessToken,                                                              # Required: access token for dnceng; should be provided via KeyVault
+  [string[]] $SourceToolsList,                                                                   # Optional: list of SDL tools to run on source code
+  [string[]] $ArtifactToolsList,                                                                 # Optional: list of SDL tools to run on built artifacts
+  [bool] $TsaPublish=$False,                                                                     # Optional: true will publish results to TSA; only set to true after onboarding to TSA; TSA is the automated framework used to upload test results as bugs.
+  [string] $TsaBranchName=$env:BUILD_SOURCEBRANCH,                                               # Optional: required for TSA publish; defaults to $(Build.SourceBranchName); TSA is the automated framework used to upload test results as bugs.
+  [string] $TsaRepositoryName=$env:BUILD_REPOSITORY_NAME,                                        # Optional: TSA repository name; will be generated automatically if not submitted; TSA is the automated framework used to upload test results as bugs.
+  [string] $BuildNumber=$env:BUILD_BUILDNUMBER,                                                  # Optional: required for TSA publish; defaults to $(Build.BuildNumber)
+  [bool] $UpdateBaseline=$False,                                                                 # Optional: if true, will update the baseline in the repository; should only be run after fixing any issues which need to be fixed
+  [bool] $TsaOnboard=$False,                                                                     # Optional: if true, will onboard the repository to TSA; should only be run once; TSA is the automated framework used to upload test results as bugs.
+  [string] $TsaInstanceUrl,                                                                      # Optional: only needed if TsaOnboard or TsaPublish is true; the instance-url registered with TSA; TSA is the automated framework used to upload test results as bugs.
+  [string] $TsaCodebaseName,                                                                     # Optional: only needed if TsaOnboard or TsaPublish is true; the name of the codebase registered with TSA; TSA is the automated framework used to upload test results as bugs.
+  [string] $TsaProjectName,                                                                      # Optional: only needed if TsaOnboard or TsaPublish is true; the name of the project registered with TSA; TSA is the automated framework used to upload test results as bugs.
+  [string] $TsaNotificationEmail,                                                                # Optional: only needed if TsaOnboard is true; the email(s) which will receive notifications of TSA bug filings (e.g. alias@microsoft.com); TSA is the automated framework used to upload test results as bugs.
+  [string] $TsaCodebaseAdmin,                                                                    # Optional: only needed if TsaOnboard is true; the aliases which are admins of the TSA codebase (e.g. DOMAIN\alias); TSA is the automated framework used to upload test results as bugs.
+  [string] $TsaBugAreaPath,                                                                      # Optional: only needed if TsaOnboard is true; the area path where TSA will file bugs in AzDO; TSA is the automated framework used to upload test results as bugs.
+  [string] $TsaIterationPath,                                                                    # Optional: only needed if TsaOnboard is true; the iteration path where TSA will file bugs in AzDO; TSA is the automated framework used to upload test results as bugs.
+  [string] $GuardianLoggerLevel="Standard",                                                      # Optional: the logger level for the Guardian CLI; options are Trace, Verbose, Standard, Warning, and Error
+  [string[]] $CrScanAdditionalRunConfigParams,                                                   # Optional: Additional Params to custom build a CredScan run config in the format @("xyz:abc","sdf:1")
+  [string[]] $PoliCheckAdditionalRunConfigParams                                                 # Optional: Additional Params to custom build a Policheck run config in the format @("xyz:abc","sdf:1")
 )
 
 $ErrorActionPreference = "Stop"
diff --git a/eng/common/sdl/extract-artifact-packages.ps1 b/eng/common/sdl/extract-artifact-packages.ps1
index 6e682501..d857ae21 100644
--- a/eng/common/sdl/extract-artifact-packages.ps1
+++ b/eng/common/sdl/extract-artifact-packages.ps1
@@ -10,6 +10,7 @@ Set-StrictMode -Version 2.0
 # scripts don't necessarily execute in the same agent that run the
 # build.ps1/sh script this variable isn't automatically set.
 $ci = $true
+$disableConfigureToolsetImport = "true"
 . $PSScriptRoot\..\tools.ps1
 
 $ExtractPackage = {
diff --git a/eng/common/templates/job/execute-sdl.yml b/eng/common/templates/job/execute-sdl.yml
index a7f99641..9a00430d 100644
--- a/eng/common/templates/job/execute-sdl.yml
+++ b/eng/common/templates/job/execute-sdl.yml
@@ -24,15 +24,15 @@ jobs:
       buildType: current
       downloadType: specific files
       matchingPattern: "**"
-      downloadPath: $(Build.SourcesDirectory)\artifacts
+      downloadPath: $(Build.ArtifactStagingDirectory)\artifacts
   - powershell: eng/common/sdl/extract-artifact-packages.ps1
-      -InputPath $(Build.SourcesDirectory)\artifacts\BlobArtifacts
-      -ExtractPath $(Build.SourcesDirectory)\artifacts\BlobArtifacts
+      -InputPath $(Build.ArtifactStagingDirectory)\artifacts\BlobArtifacts
+      -ExtractPath $(Build.ArtifactStagingDirectory)\artifacts\BlobArtifacts
     displayName: Extract Blob Artifacts
     continueOnError: ${{ parameters.sdlContinueOnError }}
   - powershell: eng/common/sdl/extract-artifact-packages.ps1
-      -InputPath $(Build.SourcesDirectory)\artifacts\PackageArtifacts
-      -ExtractPath $(Build.SourcesDirectory)\artifacts\PackageArtifacts
+      -InputPath $(Build.ArtifactStagingDirectory)\artifacts\PackageArtifacts
+      -ExtractPath $(Build.ArtifactStagingDirectory)\artifacts\PackageArtifacts
     displayName: Extract Package Artifacts
     continueOnError: ${{ parameters.sdlContinueOnError }}
   - task: NuGetToolInstaller@1
diff --git a/eng/common/templates/job/job.yml b/eng/common/templates/job/job.yml
index 13dd40e2..ecebd0f0 100644
--- a/eng/common/templates/job/job.yml
+++ b/eng/common/templates/job/job.yml
@@ -17,7 +17,7 @@ parameters:
   workspace: ''
 
 # Job base template specific parameters
-  # See schema documentation in /Documentation/AzureDevOps/TemplateSchema.md
+  # See schema documentation - https://github.com/dotnet/arcade/blob/master/Documentation/AzureDevOps/TemplateSchema.md
   artifacts: ''
   enableMicrobuild: false
   enablePublishBuildArtifacts: false
diff --git a/eng/common/templates/post-build/channels/netcore-3-tools-validation.yml b/eng/common/templates/post-build/channels/netcore-3-tools-validation.yml
new file mode 100644
index 00000000..084bd15e
--- /dev/null
+++ b/eng/common/templates/post-build/channels/netcore-3-tools-validation.yml
@@ -0,0 +1,98 @@
+parameters:
+  artifactsPublishingAdditionalParameters: ''
+  dependsOn:
+  - Validate
+  publishInstallersAndChecksums: false
+
+stages:
+- stage: NetCore_3_Tools_Validation_Publish
+  dependsOn: ${{ parameters.dependsOn }}
+  variables:
+    - template: ../common-variables.yml
+  displayName: .NET 3 Tools - Validation Publishing
+  jobs:
+  - template: ../setup-maestro-vars.yml
+
+  - job: publish_assets
+    displayName: Publish Assets
+    dependsOn: setupMaestroVars
+    variables:
+      - group: DotNet-Blob-Feed
+      - group: AzureDevOps-Artifact-Feeds-Pats
+      - name: BARBuildId
+        value: $[ dependencies.setupMaestroVars.outputs['setReleaseVars.BARBuildId'] ]
+      - name: IsStableBuild
+        value: $[ dependencies.setupMaestroVars.outputs['setReleaseVars.IsStableBuild'] ]
+    condition: contains(dependencies.setupMaestroVars.outputs['setReleaseVars.InitialChannels'], format('[{0}]', variables.NETCore_3_Tools_Validation_Channel_Id))
+    pool:
+      vmImage: 'windows-2019'
+    steps:
+      - task: DownloadBuildArtifacts@0
+        displayName: Download Package Artifacts
+        inputs:
+          buildType: current
+          artifactName: PackageArtifacts
+        continueOnError: true
+
+      - task: DownloadBuildArtifacts@0
+        displayName: Download Blob Artifacts
+        inputs:
+          buildType: current
+          artifactName: BlobArtifacts
+        continueOnError: true
+
+      - task: DownloadBuildArtifacts@0
+        displayName: Download Asset Manifests
+        inputs:
+          buildType: current
+          artifactName: AssetManifests
+
+      - task: NuGetToolInstaller@1
+        displayName: 'Install NuGet.exe'
+
+      # This is necessary whenever we want to publish/restore to an AzDO private feed
+      - task: NuGetAuthenticate@0
+        displayName: 'Authenticate to AzDO Feeds'
+
+      - task: PowerShell@2
+        displayName: Enable cross-org publishing
+        inputs:
+          filePath: eng\common\enable-cross-org-publishing.ps1
+          arguments: -token $(dn-bot-dnceng-artifact-feeds-rw)
+
+      - task: PowerShell@2
+        displayName: Publish Assets
+        inputs:
+          filePath: eng\common\sdk-task.ps1
+          arguments: -task PublishArtifactsInManifest -restore -msbuildEngine dotnet
+            /p:ArtifactsCategory=$(_DotNetValidationArtifactsCategory)
+            /p:IsStableBuild=$(IsStableBuild)
+            /p:IsInternalBuild=$(IsInternalBuild)
+            /p:RepositoryName=$(Build.Repository.Name)
+            /p:CommitSha=$(Build.SourceVersion)
+            /p:NugetPath=$(NuGetExeToolPath)
+            /p:AzdoTargetFeedPAT='$(dn-bot-dnceng-universal-packages-rw)'
+            /p:AzureStorageTargetFeedPAT='$(dotnetfeed-storage-access-key-1)'
+            /p:BARBuildId=$(BARBuildId)
+            /p:MaestroApiEndpoint='$(MaestroApiEndPoint)'
+            /p:BuildAssetRegistryToken='$(MaestroApiAccessToken)'
+            /p:ManifestsBasePath='$(Build.ArtifactStagingDirectory)/AssetManifests/'
+            /p:BlobBasePath='$(Build.ArtifactStagingDirectory)/BlobArtifacts/'
+            /p:PackageBasePath='$(Build.ArtifactStagingDirectory)/PackageArtifacts/'
+            /p:Configuration=Release
+            /p:PublishInstallersAndChecksums=${{ parameters.publishInstallersAndChecksums }}
+            /p:InstallersTargetStaticFeed=$(InstallersBlobFeedUrl)
+            /p:InstallersAzureAccountKey=$(dotnetcli-storage-key)
+            /p:ChecksumsTargetStaticFeed=$(ChecksumsBlobFeedUrl)
+            /p:ChecksumsAzureAccountKey=$(dotnetclichecksums-storage-key)
+            /p:AzureDevOpsStaticShippingFeed='https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json'
+            /p:AzureDevOpsStaticShippingFeedKey='$(dn-bot-dnceng-artifact-feeds-rw)'
+            /p:AzureDevOpsStaticTransportFeed='https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json'
+            /p:AzureDevOpsStaticTransportFeedKey='$(dn-bot-dnceng-artifact-feeds-rw)'
+            /p:AzureDevOpsStaticSymbolsFeed='https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools-symbols/nuget/v3/index.json'
+            /p:AzureDevOpsStaticSymbolsFeedKey='$(dn-bot-dnceng-artifact-feeds-rw)'
+            ${{ parameters.artifactsPublishingAdditionalParameters }}
+
+      - template: ../../steps/promote-build.yml
+        parameters:
+          ChannelId: ${{ variables.NETCore_3_Tools_Validation_Channel_Id }}
diff --git a/eng/common/templates/post-build/channels/netcore-3-tools.yml b/eng/common/templates/post-build/channels/netcore-3-tools.yml
new file mode 100644
index 00000000..b8f8ce91
--- /dev/null
+++ b/eng/common/templates/post-build/channels/netcore-3-tools.yml
@@ -0,0 +1,133 @@
+parameters:
+  artifactsPublishingAdditionalParameters: ''
+  dependsOn:
+  - Validate
+  publishInstallersAndChecksums: false
+  symbolPublishingAdditionalParameters: ''
+
+stages:
+- stage: NetCore_3_Tools_Publish
+  dependsOn: ${{ parameters.dependsOn }}
+  variables:
+    - template: ../common-variables.yml
+  displayName: .NET 3 Tools Publishing
+  jobs:
+  - template: ../setup-maestro-vars.yml
+
+  - job:
+    displayName: Symbol Publishing
+    dependsOn: setupMaestroVars
+    condition: contains(dependencies.setupMaestroVars.outputs['setReleaseVars.InitialChannels'], format('[{0}]', variables.NetCore_3_Tools_Channel_Id))
+    variables:
+      - group: DotNet-Symbol-Server-Pats
+    pool:
+      vmImage: 'windows-2019'
+    steps:
+      - task: DownloadBuildArtifacts@0
+        displayName: Download Blob Artifacts
+        inputs:
+          artifactName: 'BlobArtifacts'
+        continueOnError: true
+
+      - task: DownloadBuildArtifacts@0
+        displayName: Download PDB Artifacts
+        inputs:
+          artifactName: 'PDBArtifacts'
+        continueOnError: true
+
+      - task: PowerShell@2
+        displayName: Publish
+        inputs:
+          filePath: eng\common\sdk-task.ps1
+          arguments: -task PublishToSymbolServers -restore -msbuildEngine dotnet
+            /p:DotNetSymbolServerTokenMsdl=$(microsoft-symbol-server-pat)
+            /p:DotNetSymbolServerTokenSymWeb=$(symweb-symbol-server-pat)
+            /p:PDBArtifactsDirectory='$(Build.ArtifactStagingDirectory)/PDBArtifacts/'
+            /p:BlobBasePath='$(Build.ArtifactStagingDirectory)/BlobArtifacts/'
+            /p:SymbolPublishingExclusionsFile='$(Build.SourcesDirectory)/eng/SymbolPublishingExclusionsFile.txt'
+            /p:Configuration=Release
+            ${{ parameters.symbolPublishingAdditionalParameters }}
+
+  - job: publish_assets
+    displayName: Publish Assets
+    dependsOn: setupMaestroVars
+    variables:
+      - group: DotNet-Blob-Feed
+      - group: AzureDevOps-Artifact-Feeds-Pats
+      - name: BARBuildId
+        value: $[ dependencies.setupMaestroVars.outputs['setReleaseVars.BARBuildId'] ]
+      - name: IsStableBuild
+        value: $[ dependencies.setupMaestroVars.outputs['setReleaseVars.IsStableBuild'] ]
+    condition: contains(dependencies.setupMaestroVars.outputs['setReleaseVars.InitialChannels'], format('[{0}]', variables.NetCore_3_Tools_Channel_Id))
+    pool:
+      vmImage: 'windows-2019'
+    steps:
+      - task: DownloadBuildArtifacts@0
+        displayName: Download Package Artifacts
+        inputs:
+          buildType: current
+          artifactName: PackageArtifacts
+        continueOnError: true
+
+      - task: DownloadBuildArtifacts@0
+        displayName: Download Blob Artifacts
+        inputs:
+          buildType: current
+          artifactName: BlobArtifacts
+        continueOnError: true
+
+      - task: DownloadBuildArtifacts@0
+        displayName: Download Asset Manifests
+        inputs:
+          buildType: current
+          artifactName: AssetManifests
+
+      - task: NuGetToolInstaller@1
+        displayName: 'Install NuGet.exe'
+
+      # This is necessary whenever we want to publish/restore to an AzDO private feed
+      - task: NuGetAuthenticate@0
+        displayName: 'Authenticate to AzDO Feeds'
+
+      - task: PowerShell@2
+        displayName: Enable cross-org publishing
+        inputs:
+          filePath: eng\common\enable-cross-org-publishing.ps1
+          arguments: -token $(dn-bot-dnceng-artifact-feeds-rw)
+
+      - task: PowerShell@2
+        displayName: Publish Assets
+        inputs:
+          filePath: eng\common\sdk-task.ps1
+          arguments: -task PublishArtifactsInManifest -restore -msbuildEngine dotnet
+            /p:ArtifactsCategory=$(_DotNetArtifactsCategory)
+            /p:IsStableBuild=$(IsStableBuild)
+            /p:IsInternalBuild=$(IsInternalBuild)
+            /p:RepositoryName=$(Build.Repository.Name)
+            /p:CommitSha=$(Build.SourceVersion)
+            /p:NugetPath=$(NuGetExeToolPath)
+            /p:AzdoTargetFeedPAT='$(dn-bot-dnceng-universal-packages-rw)'
+            /p:AzureStorageTargetFeedPAT='$(dotnetfeed-storage-access-key-1)'
+            /p:BARBuildId=$(BARBuildId)
+            /p:MaestroApiEndpoint='$(MaestroApiEndPoint)'
+            /p:BuildAssetRegistryToken='$(MaestroApiAccessToken)'
+            /p:ManifestsBasePath='$(Build.ArtifactStagingDirectory)/AssetManifests/'
+            /p:BlobBasePath='$(Build.ArtifactStagingDirectory)/BlobArtifacts/'
+            /p:PackageBasePath='$(Build.ArtifactStagingDirectory)/PackageArtifacts/'
+            /p:Configuration=Release
+            /p:PublishInstallersAndChecksums=${{ parameters.publishInstallersAndChecksums }}
+            /p:InstallersTargetStaticFeed=$(InstallersBlobFeedUrl)
+            /p:InstallersAzureAccountKey=$(dotnetcli-storage-key)
+            /p:ChecksumsTargetStaticFeed=$(ChecksumsBlobFeedUrl)
+            /p:ChecksumsAzureAccountKey=$(dotnetclichecksums-storage-key)
+            /p:AzureDevOpsStaticShippingFeed='https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json'
+            /p:AzureDevOpsStaticShippingFeedKey='$(dn-bot-dnceng-artifact-feeds-rw)'
+            /p:AzureDevOpsStaticTransportFeed='https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json'
+            /p:AzureDevOpsStaticTransportFeedKey='$(dn-bot-dnceng-artifact-feeds-rw)'
+            /p:AzureDevOpsStaticSymbolsFeed='https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools-symbols/nuget/v3/index.json'
+            /p:AzureDevOpsStaticSymbolsFeedKey='$(dn-bot-dnceng-artifact-feeds-rw)'
+            ${{ parameters.artifactsPublishingAdditionalParameters }}
+
+      - template: ../../steps/promote-build.yml
+        parameters:
+          ChannelId: ${{ variables.NetCore_3_Tools_Channel_Id }}
\ No newline at end of file
diff --git a/eng/common/templates/post-build/channels/netcore-dev-31.yml b/eng/common/templates/post-build/channels/netcore-dev-31.yml
index af64724f..d61a8321 100644
--- a/eng/common/templates/post-build/channels/netcore-dev-31.yml
+++ b/eng/common/templates/post-build/channels/netcore-dev-31.yml
@@ -67,12 +67,14 @@ stages:
         inputs:
           buildType: current
           artifactName: PackageArtifacts
+        continueOnError: true
 
       - task: DownloadBuildArtifacts@0
         displayName: Download Blob Artifacts
         inputs:
           buildType: current
           artifactName: BlobArtifacts
+        continueOnError: true
 
       - task: DownloadBuildArtifacts@0
         displayName: Download Asset Manifests
@@ -118,7 +120,6 @@ stages:
             /p:InstallersAzureAccountKey=$(dotnetcli-storage-key)
             /p:ChecksumsTargetStaticFeed=$(ChecksumsBlobFeedUrl)
             /p:ChecksumsAzureAccountKey=$(dotnetclichecksums-storage-key)
-            /p:PublishToAzureDevOpsNuGetFeeds=true
             /p:AzureDevOpsStaticShippingFeed='https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet3.1/nuget/v3/index.json'
             /p:AzureDevOpsStaticShippingFeedKey='$(dn-bot-dnceng-artifact-feeds-rw)'
             /p:AzureDevOpsStaticTransportFeed='https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet3.1-transport/nuget/v3/index.json'
diff --git a/eng/common/templates/post-build/channels/netcore-dev-5.yml b/eng/common/templates/post-build/channels/netcore-dev-5.yml
index 6c8dff54..2a7fc340 100644
--- a/eng/common/templates/post-build/channels/netcore-dev-5.yml
+++ b/eng/common/templates/post-build/channels/netcore-dev-5.yml
@@ -67,12 +67,14 @@ stages:
         inputs:
           buildType: current
           artifactName: PackageArtifacts
+        continueOnError: true
 
       - task: DownloadBuildArtifacts@0
         displayName: Download Blob Artifacts
         inputs:
           buildType: current
           artifactName: BlobArtifacts
+        continueOnError: true
 
       - task: DownloadBuildArtifacts@0
         displayName: Download Asset Manifests
@@ -118,7 +120,6 @@ stages:
             /p:InstallersAzureAccountKey=$(dotnetcli-storage-key)
             /p:ChecksumsTargetStaticFeed=$(ChecksumsBlobFeedUrl)
             /p:ChecksumsAzureAccountKey=$(dotnetclichecksums-storage-key)
-            /p:PublishToAzureDevOpsNuGetFeeds=true
             /p:AzureDevOpsStaticShippingFeed='https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet5/nuget/v3/index.json'
             /p:AzureDevOpsStaticShippingFeedKey='$(dn-bot-dnceng-artifact-feeds-rw)'
             /p:AzureDevOpsStaticTransportFeed='https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet5-transport/nuget/v3/index.json'
diff --git a/eng/common/templates/post-build/channels/netcore-internal-30.yml b/eng/common/templates/post-build/channels/netcore-internal-30.yml
index 201ed570..8b2c9daf 100644
--- a/eng/common/templates/post-build/channels/netcore-internal-30.yml
+++ b/eng/common/templates/post-build/channels/netcore-internal-30.yml
@@ -57,6 +57,7 @@ stages:
             /p:BlobBasePath='$(Build.ArtifactStagingDirectory)/BlobArtifacts/'
             /p:SymbolPublishingExclusionsFile='$(Build.SourcesDirectory)/eng/SymbolPublishingExclusionsFile.txt'
             /p:Configuration=Release
+            /p:PublishToMSDL=false
             ${{ parameters.symbolPublishingAdditionalParameters }}
 
   - job: publish_assets
@@ -78,12 +79,14 @@ stages:
         inputs:
           buildType: current
           artifactName: PackageArtifacts
+        continueOnError: true
 
       - task: DownloadBuildArtifacts@0
         displayName: Download Blob Artifacts
         inputs:
           buildType: current
           artifactName: BlobArtifacts
+        continueOnError: true
 
       - task: DownloadBuildArtifacts@0
         displayName: Download Asset Manifests
@@ -128,7 +131,6 @@ stages:
             /p:ChecksumsAzureAccountKey=$(InternalChecksumsBlobFeedKey)
             /p:InstallersTargetStaticFeed=$(InternalInstallersBlobFeedUrl)
             /p:InstallersAzureAccountKey=$(InternalInstallersBlobFeedKey)
-            /p:PublishToAzureDevOpsNuGetFeeds=true
             /p:AzureDevOpsStaticShippingFeed='https://pkgs.dev.azure.com/dnceng/_packaging/dotnet3-internal/nuget/v3/index.json'
             /p:AzureDevOpsStaticShippingFeedKey='$(dn-bot-dnceng-artifact-feeds-rw)'
             /p:AzureDevOpsStaticTransportFeed='https://pkgs.dev.azure.com/dnceng/_packaging/dotnet3-internal-transport/nuget/v3/index.json'
diff --git a/eng/common/templates/post-build/channels/netcore-release-30.yml b/eng/common/templates/post-build/channels/netcore-release-30.yml
index 206dd43e..56c34590 100644
--- a/eng/common/templates/post-build/channels/netcore-release-30.yml
+++ b/eng/common/templates/post-build/channels/netcore-release-30.yml
@@ -67,12 +67,14 @@ stages:
         inputs:
           buildType: current
           artifactName: PackageArtifacts
+        continueOnError: true
 
       - task: DownloadBuildArtifacts@0
         displayName: Download Blob Artifacts
         inputs:
           buildType: current
           artifactName: BlobArtifacts
+        continueOnError: true
 
       - task: DownloadBuildArtifacts@0
         displayName: Download Asset Manifests
@@ -118,7 +120,6 @@ stages:
             /p:InstallersAzureAccountKey=$(dotnetcli-storage-key)
             /p:ChecksumsTargetStaticFeed=$(ChecksumsBlobFeedUrl)
             /p:ChecksumsAzureAccountKey=$(dotnetclichecksums-storage-key)
-            /p:PublishToAzureDevOpsNuGetFeeds=true
             /p:AzureDevOpsStaticShippingFeed='https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet3/nuget/v3/index.json'
             /p:AzureDevOpsStaticShippingFeedKey='$(dn-bot-dnceng-artifact-feeds-rw)'
             /p:AzureDevOpsStaticTransportFeed='https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet3-transport/nuget/v3/index.json'
diff --git a/eng/common/templates/post-build/channels/netcore-release-31.yml b/eng/common/templates/post-build/channels/netcore-release-31.yml
index 6270c828..a65254fe 100644
--- a/eng/common/templates/post-build/channels/netcore-release-31.yml
+++ b/eng/common/templates/post-build/channels/netcore-release-31.yml
@@ -67,12 +67,14 @@ stages:
         inputs:
           buildType: current
           artifactName: PackageArtifacts
+        continueOnError: true
 
       - task: DownloadBuildArtifacts@0
         displayName: Download Blob Artifacts
         inputs:
           buildType: current
           artifactName: BlobArtifacts
+        continueOnError: true
 
       - task: DownloadBuildArtifacts@0
         displayName: Download Asset Manifests
@@ -118,7 +120,6 @@ stages:
             /p:InstallersAzureAccountKey=$(dotnetcli-storage-key)
             /p:ChecksumsTargetStaticFeed=$(ChecksumsBlobFeedUrl)
             /p:ChecksumsAzureAccountKey=$(dotnetclichecksums-storage-key)
-            /p:PublishToAzureDevOpsNuGetFeeds=true
             /p:AzureDevOpsStaticShippingFeed='https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet3.1/nuget/v3/index.json'
             /p:AzureDevOpsStaticShippingFeedKey='$(dn-bot-dnceng-artifact-feeds-rw)'
             /p:AzureDevOpsStaticTransportFeed='https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet3.1-transport/nuget/v3/index.json'
diff --git a/eng/common/templates/post-build/channels/netcore-tools-latest.yml b/eng/common/templates/post-build/channels/netcore-tools-latest.yml
index 9bf9626c..84ab1296 100644
--- a/eng/common/templates/post-build/channels/netcore-tools-latest.yml
+++ b/eng/common/templates/post-build/channels/netcore-tools-latest.yml
@@ -67,12 +67,14 @@ stages:
         inputs:
           buildType: current
           artifactName: PackageArtifacts
+        continueOnError: true
 
       - task: DownloadBuildArtifacts@0
         displayName: Download Blob Artifacts
         inputs:
           buildType: current
           artifactName: BlobArtifacts
+        continueOnError: true
 
       - task: DownloadBuildArtifacts@0
         displayName: Download Asset Manifests
@@ -118,7 +120,6 @@ stages:
             /p:InstallersAzureAccountKey=$(dotnetcli-storage-key)
             /p:ChecksumsTargetStaticFeed=$(ChecksumsBlobFeedUrl)
             /p:ChecksumsAzureAccountKey=$(dotnetclichecksums-storage-key)
-            /p:PublishToAzureDevOpsNuGetFeeds=true
             /p:AzureDevOpsStaticShippingFeed='https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json'
             /p:AzureDevOpsStaticShippingFeedKey='$(dn-bot-dnceng-artifact-feeds-rw)'
             /p:AzureDevOpsStaticTransportFeed='https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json'
diff --git a/eng/common/templates/post-build/channels/public-validation-release.yml b/eng/common/templates/post-build/channels/netcore-tools-validation.yml
similarity index 94%
rename from eng/common/templates/post-build/channels/public-validation-release.yml
rename to eng/common/templates/post-build/channels/netcore-tools-validation.yml
index 5c8e91cc..2dfc48c1 100644
--- a/eng/common/templates/post-build/channels/public-validation-release.yml
+++ b/eng/common/templates/post-build/channels/netcore-tools-validation.yml
@@ -23,7 +23,7 @@ stages:
         value: $[ dependencies.setupMaestroVars.outputs['setReleaseVars.BARBuildId'] ]
       - name: IsStableBuild
         value: $[ dependencies.setupMaestroVars.outputs['setReleaseVars.IsStableBuild'] ]
-    condition: contains(dependencies.setupMaestroVars.outputs['setReleaseVars.InitialChannels'], format('[{0}]', variables.PublicValidationRelease_30_Channel_Id))
+    condition: contains(dependencies.setupMaestroVars.outputs['setReleaseVars.InitialChannels'], format('[{0}]', variables.NetCore_Tools_Validation_Channel_Id))
     pool:
       vmImage: 'windows-2019'
     steps:
@@ -32,12 +32,14 @@ stages:
         inputs:
           buildType: current
           artifactName: PackageArtifacts
+        continueOnError: true
 
       - task: DownloadBuildArtifacts@0
         displayName: Download Blob Artifacts
         inputs:
           buildType: current
           artifactName: BlobArtifacts
+        continueOnError: true
 
       - task: DownloadBuildArtifacts@0
         displayName: Download Asset Manifests
@@ -83,7 +85,6 @@ stages:
             /p:InstallersAzureAccountKey=$(dotnetcli-storage-key)
             /p:ChecksumsTargetStaticFeed=$(ChecksumsBlobFeedUrl)
             /p:ChecksumsAzureAccountKey=$(dotnetclichecksums-storage-key)
-            /p:PublishToAzureDevOpsNuGetFeeds=true
             /p:AzureDevOpsStaticShippingFeed='https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json'
             /p:AzureDevOpsStaticShippingFeedKey='$(dn-bot-dnceng-artifact-feeds-rw)'
             /p:AzureDevOpsStaticTransportFeed='https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json'
@@ -94,4 +95,4 @@ stages:
 
       - template: ../../steps/promote-build.yml
         parameters:
-          ChannelId: ${{ variables.PublicValidationRelease_30_Channel_Id }}
+          ChannelId: ${{ variables.NetCore_Tools_Validation_Channel_Id }}
diff --git a/eng/common/templates/post-build/common-variables.yml b/eng/common/templates/post-build/common-variables.yml
index 9ccc08b2..b4eed6f1 100644
--- a/eng/common/templates/post-build/common-variables.yml
+++ b/eng/common/templates/post-build/common-variables.yml
@@ -12,13 +12,21 @@ variables:
     value: 131
 
   # .NET Tools - Validation
-  - name: PublicValidationRelease_30_Channel_Id
+  - name: NetCore_Tools_Validation_Channel_Id
     value: 9
 
   # .NET Tools - Latest
   - name: NetCore_Tools_Latest_Channel_Id
     value: 2
 
+  # .NET 3 Tools - Validation
+  - name: NETCore_3_Tools_Validation_Channel_Id
+    value: 390
+
+  # .NET 3 Tools - Latest
+  - name: NetCore_3_Tools_Channel_Id
+    value: 344
+
   # .NET Core 3.0 Internal Servicing
   - name: InternalServicing_30_Channel_Id
     value: 184
diff --git a/eng/common/templates/post-build/post-build.yml b/eng/common/templates/post-build/post-build.yml
index 3f06b5d1..913ac244 100644
--- a/eng/common/templates/post-build/post-build.yml
+++ b/eng/common/templates/post-build/post-build.yml
@@ -119,8 +119,7 @@ stages:
     artifactsPublishingAdditionalParameters: ${{ parameters.artifactsPublishingAdditionalParameters }}
     dependsOn: ${{ parameters.publishDependsOn }}
     publishInstallersAndChecksums: ${{ parameters.publishInstallersAndChecksums }}
-    symbolPublishingAdditionalParameters: ${{ parameters.symbolPublishingAdditionalParameters }}
-
+    
 - template: \eng\common\templates\post-build\channels\netcore-dev-31.yml
   parameters:
     artifactsPublishingAdditionalParameters: ${{ parameters.artifactsPublishingAdditionalParameters }}
@@ -135,11 +134,25 @@ stages:
     publishInstallersAndChecksums: ${{ parameters.publishInstallersAndChecksums }}
     symbolPublishingAdditionalParameters: ${{ parameters.symbolPublishingAdditionalParameters }}
 
-- template: \eng\common\templates\post-build\channels\public-validation-release.yml
+- template: \eng\common\templates\post-build\channels\netcore-tools-validation.yml
   parameters:
     artifactsPublishingAdditionalParameters: ${{ parameters.artifactsPublishingAdditionalParameters }}
     dependsOn: ${{ parameters.publishDependsOn }}
     publishInstallersAndChecksums: ${{ parameters.publishInstallersAndChecksums }}
+    symbolPublishingAdditionalParameters: ${{ parameters.symbolPublishingAdditionalParameters }}
+
+- template: \eng\common\templates\post-build\channels\netcore-3-tools-validation.yml
+  parameters:
+    artifactsPublishingAdditionalParameters: ${{ parameters.artifactsPublishingAdditionalParameters }}
+    dependsOn: ${{ parameters.publishDependsOn }}
+    publishInstallersAndChecksums: ${{ parameters.publishInstallersAndChecksums }}
+
+- template: \eng\common\templates\post-build\channels\netcore-3-tools.yml
+  parameters:
+    dependsOn: ${{ parameters.publishDependsOn }}
+    symbolPublishingAdditionalParameters: ${{ parameters.symbolPublishingAdditionalParameters }}
+    artifactsPublishingAdditionalParameters: ${{ parameters.artifactsPublishingAdditionalParameters }}
+    publishInstallersAndChecksums: ${{ parameters.publishInstallersAndChecksums }}
 
 - template: \eng\common\templates\post-build\channels\netcore-release-30.yml
   parameters:
diff --git a/eng/common/templates/post-build/setup-maestro-vars.yml b/eng/common/templates/post-build/setup-maestro-vars.yml
index 56242b06..716b53f7 100644
--- a/eng/common/templates/post-build/setup-maestro-vars.yml
+++ b/eng/common/templates/post-build/setup-maestro-vars.yml
@@ -4,6 +4,8 @@ jobs:
   pool:
     vmImage: 'windows-2019'
   steps:
+    - checkout: none
+
     - task: DownloadBuildArtifacts@0
       displayName: Download Release Configs
       inputs:
@@ -14,5 +16,25 @@ jobs:
       name: setReleaseVars
       displayName: Set Release Configs Vars
       inputs:
-        filePath: $(Build.SourcesDirectory)/eng/common/post-build/setup-maestro-vars.ps1
-        arguments: -ReleaseConfigsPath '$(Build.StagingDirectory)/ReleaseConfigs/ReleaseConfigs.txt'
+        targetType: inline
+        script: |
+          try {
+            $Content = Get-Content $(Build.StagingDirectory)/ReleaseConfigs/ReleaseConfigs.txt
+
+            $BarId = $Content | Select -Index 0
+
+            $Channels = ""
+            $Content | Select -Index 1 | ForEach-Object { $Channels += "$_ ," }
+
+            $IsStableBuild = $Content | Select -Index 2
+
+            Write-Host "##vso[task.setvariable variable=BARBuildId;isOutput=true]$BarId"
+            Write-Host "##vso[task.setvariable variable=InitialChannels;isOutput=true]$Channels"
+            Write-Host "##vso[task.setvariable variable=IsStableBuild;isOutput=true]$IsStableBuild"
+          }
+          catch {
+            Write-Host $_
+            Write-Host $_.Exception
+            Write-Host $_.ScriptStackTrace
+            exit 1
+          }
diff --git a/eng/common/templates/steps/send-to-helix.yml b/eng/common/templates/steps/send-to-helix.yml
index 05df886f..30becf01 100644
--- a/eng/common/templates/steps/send-to-helix.yml
+++ b/eng/common/templates/steps/send-to-helix.yml
@@ -23,6 +23,7 @@ parameters:
   EnableXUnitReporter: false             # optional -- true enables XUnit result reporting to Mission Control
   WaitForWorkItemCompletion: true        # optional -- true will make the task wait until work items have been completed and fail the build if work items fail. False is "fire and forget."
   IsExternal: false                      # [DEPRECATED] -- doesn't do anything, jobs are external if HelixAccessToken is empty and Creator is set
+  HelixBaseUri: 'https://helix.dot.net/' # optional -- sets the Helix API base URI (allows targeting int)
   Creator: ''                            # optional -- if the build is external, use this to specify who is sending the job
   DisplayNamePrefix: 'Run Tests'         # optional -- rename the beginning of the displayName of the steps in AzDO 
   condition: succeeded()                 # optional -- condition for step to execute; defaults to succeeded()
@@ -55,6 +56,7 @@ steps:
       DotNetCliVersion: ${{ parameters.DotNetCliVersion }}
       EnableXUnitReporter: ${{ parameters.EnableXUnitReporter }}
       WaitForWorkItemCompletion: ${{ parameters.WaitForWorkItemCompletion }}
+      HelixBaseUri: ${{ parameters.HelixBaseUri }}
       Creator: ${{ parameters.Creator }}
       SYSTEM_ACCESSTOKEN: $(System.AccessToken)
     condition: and(${{ parameters.condition }}, eq(variables['Agent.Os'], 'Windows_NT'))
@@ -85,6 +87,7 @@ steps:
       DotNetCliVersion: ${{ parameters.DotNetCliVersion }}
       EnableXUnitReporter: ${{ parameters.EnableXUnitReporter }}
       WaitForWorkItemCompletion: ${{ parameters.WaitForWorkItemCompletion }}
+      HelixBaseUri: ${{ parameters.HelixBaseUri }}
       Creator: ${{ parameters.Creator }}
       SYSTEM_ACCESSTOKEN: $(System.AccessToken)
     condition: and(${{ parameters.condition }}, ne(variables['Agent.Os'], 'Windows_NT'))
diff --git a/eng/common/tools.ps1 b/eng/common/tools.ps1
index 5c94bd78..c4ca69dd 100644
--- a/eng/common/tools.ps1
+++ b/eng/common/tools.ps1
@@ -49,6 +49,8 @@
 # An array of names of processes to stop on script exit if prepareMachine is true.
 $processesToStopOnExit = if (Test-Path variable:processesToStopOnExit) { $processesToStopOnExit } else { @("msbuild", "dotnet", "vbcscompiler") }
 
+$disableConfigureToolsetImport = if (Test-Path variable:disableConfigureToolsetImport) { $disableConfigureToolsetImport } else { $null }
+
 set-strictmode -version 2.0
 $ErrorActionPreference = "Stop"
 [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
@@ -175,7 +177,14 @@ function InstallDotNetSdk([string] $dotnetRoot, [string] $version, [string] $arc
   InstallDotNet $dotnetRoot $version $architecture
 }
 
-function InstallDotNet([string] $dotnetRoot, [string] $version, [string] $architecture = "", [string] $runtime = "", [bool] $skipNonVersionedFiles = $false) {
+function InstallDotNet([string] $dotnetRoot, 
+  [string] $version, 
+  [string] $architecture = "", 
+  [string] $runtime = "", 
+  [bool] $skipNonVersionedFiles = $false, 
+  [string] $runtimeSourceFeed = "", 
+  [string] $runtimeSourceFeedKey = "") {
+
   $installScript = GetDotNetInstallScript $dotnetRoot
   $installParameters = @{
     Version = $version
@@ -186,10 +195,29 @@ function InstallDotNet([string] $dotnetRoot, [string] $version, [string] $archit
   if ($runtime) { $installParameters.Runtime = $runtime }
   if ($skipNonVersionedFiles) { $installParameters.SkipNonVersionedFiles = $skipNonVersionedFiles }
 
-  & $installScript @installParameters
-  if ($lastExitCode -ne 0) {
-    Write-PipelineTelemetryError -Category "InitializeToolset" -Message "Failed to install dotnet cli (exit code '$lastExitCode')."
-    ExitWithExitCode $lastExitCode
+  try {
+    & $installScript @installParameters
+  }
+  catch {
+    Write-PipelineTelemetryError -Category "InitializeToolset" -Message "Failed to install dotnet runtime '$runtime' from public location."
+
+    # Only the runtime can be installed from a custom [private] location.
+    if ($runtime -and ($runtimeSourceFeed -or $runtimeSourceFeedKey)) {
+      if ($runtimeSourceFeed) { $installParameters.AzureFeed = $runtimeSourceFeed }
+
+      if ($runtimeSourceFeedKey) {
+        $decodedBytes = [System.Convert]::FromBase64String($runtimeSourceFeedKey)
+        $decodedString = [System.Text.Encoding]::UTF8.GetString($decodedBytes)
+        $installParameters.FeedCredential = $decodedString
+      }
+
+      try {
+        & $installScript @installParameters
+      }
+      catch {
+        Write-PipelineTelemetryError -Category "InitializeToolset" -Message "Failed to install dotnet runtime '$runtime' from custom location '$runtimeSourceFeed'."
+      }
+    }
   }
 }
 
@@ -418,6 +446,9 @@ function GetSdkTaskProject([string]$taskName) {
 }
 
 function InitializeNativeTools() {
+  if ($env:DisableNativeToolsetInstalls) {
+    return
+  }
   if (Get-Member -InputObject $GlobalJson -Name "native-tools") {
     $nativeArgs= @{}
     if ($ci) {
@@ -599,3 +630,12 @@ Write-PipelineSetVariable -Name 'Artifacts.Toolset' -Value $ToolsetDir
 Write-PipelineSetVariable -Name 'Artifacts.Log' -Value $LogDir
 Write-PipelineSetVariable -Name 'TEMP' -Value $TempDir
 Write-PipelineSetVariable -Name 'TMP' -Value $TempDir
+
+# Import custom tools configuration, if present in the repo.
+# Note: Import in global scope so that the script set top-level variables without qualification.
+if (!$disableConfigureToolsetImport) {
+  $configureToolsetScript = Join-Path $EngRoot "configure-toolset.ps1"
+  if (Test-Path $configureToolsetScript) {
+      . $configureToolsetScript
+  }
+}
diff --git a/eng/common/tools.sh b/eng/common/tools.sh
index 93ee4d67..35a80c3f 100755
--- a/eng/common/tools.sh
+++ b/eng/common/tools.sh
@@ -4,6 +4,7 @@
 
 # CI mode - set to true on CI server for PR validation build or official build.
 ci=${ci:-false}
+disable_configure_toolset_import=${disable_configure_toolset_import:-null}
 
 # Set to true to use the pipelines logger which will enable Azure logging output.
 # https://github.com/Microsoft/azure-pipelines-tasks/blob/master/docs/authoring/commands.md
@@ -191,8 +192,28 @@ function InstallDotNet {
   fi
   bash "$install_script" --version $version --install-dir "$root" $archArg $runtimeArg $skipNonVersionedFilesArg || {
     local exit_code=$?
-    Write-PipelineTelemetryError -category 'InitializeToolset' "Failed to install dotnet SDK (exit code '$exit_code')."
-    ExitWithExitCode $exit_code
+    Write-PipelineTelemetryError -category 'InitializeToolset' "Failed to install dotnet SDK from public location (exit code '$exit_code')."
+
+    if [[ -n "$runtimeArg" ]]; then
+      local runtimeSourceFeed=''
+      if [[ -n "${6:-}" ]]; then
+        runtimeSourceFeed="--azure-feed $6"
+      fi
+
+      local runtimeSourceFeedKey=''
+      if [[ -n "${7:-}" ]]; then
+        decodedFeedKey=`echo $7 | base64 --decode`
+        runtimeSourceFeedKey="--feed-credential $decodedFeedKey"
+      fi
+
+      if [[ -n "$runtimeSourceFeed" || -n "$runtimeSourceFeedKey" ]]; then
+        bash "$install_script" --version $version --install-dir "$root" $archArg $runtimeArg $skipNonVersionedFilesArg $runtimeSourceFeed $runtimeSourceFeedKey || {
+          local exit_code=$?
+          Write-PipelineTelemetryError -category 'InitializeToolset' "Failed to install dotnet SDK from custom location '$runtimeSourceFeed' (exit code '$exit_code')."
+          ExitWithExitCode $exit_code
+        }
+      fi
+    fi
   }
 }
 
@@ -252,6 +273,9 @@ function GetNuGetPackageCachePath {
 }
 
 function InitializeNativeTools() {
+  if [[ -z "${DisableNativeToolsetInstalls:-}" ]]; then
+    return
+  fi
   if grep -Fq "native-tools" $global_json_file
   then
     local nativeArgs=""
@@ -332,7 +356,7 @@ function MSBuild {
     # Work around issues with Azure Artifacts credential provider
     # https://github.com/dotnet/arcade/issues/3932
     if [[ "$ci" == true ]]; then
-      dotnet nuget locals http-cache -c
+      "$_InitializeBuildTool" nuget locals http-cache -c
 
       export NUGET_PLUGIN_HANDSHAKE_TIMEOUT_IN_SECONDS=20
       export NUGET_PLUGIN_REQUEST_TIMEOUT_IN_SECONDS=20
@@ -411,3 +435,18 @@ Write-PipelineSetVariable -name "Artifacts.Toolset" -value "$toolset_dir"
 Write-PipelineSetVariable -name "Artifacts.Log" -value "$log_dir"
 Write-PipelineSetVariable -name "Temp" -value "$temp_dir"
 Write-PipelineSetVariable -name "TMP" -value "$temp_dir"
+
+# Import custom tools configuration, if present in the repo.
+if [[ "$disable_configure_toolset_import" != null ]]; then
+  configure_toolset_script="$eng_root/configure-toolset.sh"
+  if [[ -a "$configure_toolset_script" ]]; then
+    . "$configure_toolset_script"
+  fi
+fi
+
+# TODO: https://github.com/dotnet/arcade/issues/1468
+# Temporary workaround to avoid breaking change.
+# Remove once repos are updated.
+if [[ -n "${useInstalledDotNetCli:-}" ]]; then
+  use_installed_dotnet_cli="$useInstalledDotNetCli"
+fi
diff --git a/eng/common/validate-sdk.cmd b/eng/common/validate-sdk.cmd
deleted file mode 100644
index b0d175e4..00000000
--- a/eng/common/validate-sdk.cmd
+++ /dev/null
@@ -1,2 +0,0 @@
-@echo off
-powershell -ExecutionPolicy ByPass -NoProfile -command "& """%~dp0validate-sdk.ps1""" -restore -build -test -sign -pack -publish -ci %*"
\ No newline at end of file
diff --git a/eng/common/validate-sdk.ps1 b/eng/common/validate-sdk.ps1
deleted file mode 100644
index f427c918..00000000
--- a/eng/common/validate-sdk.ps1
+++ /dev/null
@@ -1,105 +0,0 @@
-Param(
-  [string] $barToken,
-  [string] $gitHubPat,
-  [string] $configuration = "Debug"
-)
-
-$ErrorActionPreference = "Stop"
-. $PSScriptRoot\common\tools.ps1
-$LocalNugetConfigSourceName = "arcade-local"
-
-function Check-ExitCode ($exitCode)
-{
-  if ($exitCode -ne 0) {
-    Write-Host "Arcade self-build failed"
-    ExitWithExitCode $exitCode
-  }
-}
-
-function StopDotnetIfRunning
-{
-    $dotnet = Get-Process "dotnet" -ErrorAction SilentlyContinue
-    if ($dotnet) {
-        stop-process $dotnet
-    }
-}
-
-function AddSourceToNugetConfig([string]$nugetConfigPath, [string]$source) 
-{
-    Write-Host "Adding '$source' to '$nugetConfigPath'..."
-    
-    $nugetConfig = New-Object XML
-    $nugetConfig.PreserveWhitespace = $true
-    $nugetConfig.Load($nugetConfigPath)
-    $packageSources = $nugetConfig.SelectSingleNode("//packageSources")
-    $keyAttribute = $nugetConfig.CreateAttribute("key")
-    $keyAttribute.Value = $LocalNugetConfigSourceName
-    $valueAttribute = $nugetConfig.CreateAttribute("value")
-    $valueAttribute.Value = $source
-    $newSource = $nugetConfig.CreateElement("add")
-    $newSource.Attributes.Append($keyAttribute)
-    $newSource.Attributes.Append($valueAttribute)
-    $packageSources.AppendChild($newSource)
-    $nugetConfig.Save($nugetConfigPath)
-}
-
-function MoveArtifactsToValidateSdkFolder([string]$artifactsDir, [string]$validateSdkFolderName, [string]$repoRoot)
-{
-    Rename-Item -Path $artifactsDir -NewName $validateSdkFolderName -Force
-  
-    if (!(Test-Path -Path $artifactsDir)) {
-        Create-Directory $artifactsDir
-    }
-  
-    Move-Item -Path (Join-Path $repoRoot $validateSdkFolderName) -Destination $artifactsDir -Force
-}
-
-try {
-  Write-Host "STEP 1: Build and create local packages"
-  
-  Push-Location $PSScriptRoot
-  
-  $validateSdkFolderName = "validatesdk"
-  $validateSdkDir = Join-Path $ArtifactsDir $validateSdkFolderName
-  $packagesSource = Join-Path (Join-Path (Join-Path $validateSdkDir "packages") $configuration) "NonShipping"
-  $nugetConfigPath = Join-Path $RepoRoot "NuGet.config"
-  
-  . .\common\build.ps1 -restore -build -pack -configuration $configuration
-  
-  # This is a temporary solution. When https://github.com/dotnet/arcade/issues/1293 is closed
-  # we'll be able to pass a container name to build.ps1 which will put the outputs in the
-  # artifacts-<container-name> folder.
-  MoveArtifactsToValidateSdkFolder $ArtifactsDir $validateSdkFolderName $RepoRoot
-  
-  Write-Host "STEP 2: Build using the local packages"
-  
-  AddSourceToNugetConfig $nugetConfigPath $packagesSource
-   
-  Write-Host "Updating Dependencies using Darc..."
-
-  . .\common\darc-init.ps1
-  
-  $DarcExe = "$env:USERPROFILE\.dotnet\tools"
-  $DarcExe = Resolve-Path $DarcExe
-
-  & $DarcExe\darc.exe update-dependencies --packages-folder $packagesSource --password $barToken --github-pat $gitHubPat --channel ".NET Tools - Latest"
-  
-  Check-ExitCode $lastExitCode
-  StopDotnetIfRunning
-  
-  Write-Host "Building with updated dependencies"
-
-  . .\common\build.ps1 -configuration $configuration @Args  /p:AdditionalRestoreSources=$packagesSource
-}
-catch {
-  Write-Host $_
-  Write-Host $_.Exception
-  Write-Host $_.ScriptStackTrace
-  ExitWithExitCode 1
-}
-finally {
-  Write-Host "Cleaning up workspace..."
-  StopDotnetIfRunning
-  Pop-Location
-  Write-Host "Finished building Arcade SDK with validation enabled!"
-}
diff --git a/global.json b/global.json
index 4e84977a..bd3d0c68 100644
--- a/global.json
+++ b/global.json
@@ -1,8 +1,8 @@
-{
-  "tools": {
-    "dotnet": "3.0.100"
-  },
-  "msbuild-sdks": {
-    "Microsoft.DotNet.Arcade.Sdk": "5.0.0-beta.19480.3"
-  }
-}
+{
+  "tools": {
+    "dotnet": "3.0.100"
+  },
+  "msbuild-sdks": {
+    "Microsoft.DotNet.Arcade.Sdk": "5.0.0-beta.19531.2"
+  }
+}