Merge pull request #1 from joncojonathan/master

Add troubleshooting suggestions to README

README.md

@@ -30,5 +30,28 @@ Get-ExchangeProductName 15.0.1156.6
 Update-ExchangeBuildNumberDefinition
   ~~~
 
+## Problems running the script
+By default, PowerShell restricts script execution to help protect against script based attacks.  It does this via the _execution policy_.  To validate your system's current policy setting use the `Get-ExecutionPolicy` cmdlet:
+
+  ~~~powershell
+Get-ExecutionPolicy
+  ~~~
+
+If you receive a result of _Restricted_ you'll need to either set a new policy (one of _AllSigned_, _RemoteSigned_ or _Unrestricted_ (*not recommended*)) or bypass the policy for this script.  _AllSigned_ will run any signed script whereas _RemoteSigned_ only requires a script to be signed it if comes from a remote system (downloaded from the Internet or via a file share).  _Unrestricted_ is not recommended as all scripts would be permitted to run, including those from malicious actors.
+
+__Note:__ This script is not signed.
+
+To change your execution policy (adjust the level to suit):
+
+  ~~~powershell
+Set-ExecutionPolicy RemoteSigned
+  ~~~
+
+Alternatively, start a `PowerShell` session (from the run prompt) in execution policy bypass mode, then run script as above:
+
+~~~
+powershell –ExecutionPolicy Bypass
+~~~
+
 ---
 This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/). For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or contact [opencode@microsoft.com](mailto:opencode@microsoft.com) with any additional questions or comments.