Add release notes for the first SFMC refresh release

sfmc_release_notes/SF_managed_clusters_first_refresh_release_notes.md

@@ -0,0 +1,48 @@
+# Microsoft Azure Service Fabric managed clusters first refresh release (Preview)
+
+This release includes features as described in this document. To utilize these new features, you must update the API version in the ARM template to *2021-01-01-preview*.
+
+**This release is available in the following regions; East Asia, North Europe, West Central US, East US2.**
+
+The following APIs are updated as part of this release:
+
+| API | Version | 
+|---------|----------|
+| Microsoft.ServiceFabric/managedclusters | 2021-01-01-preview |
+| Microsoft.ServiceFabric/managedclusters/nodetypes | 2021-01-01-preview |
+| Microsoft.ServiceFabric/managedclusters/applications | 2021-01-01-preview |
+| Microsoft.ServiceFabric/managedclusters/applicationTypes | 2021-01-01-preview |
+| Microsoft.ServiceFabric/managedclusters/applications/services | 2021-01-01-preview |
+
+## Features 
+
+* [ARM application deployments](https://docs.microsoft.com/azure/service-fabric/how-to-managed-cluster-app-deployment-template) - Service Fabric applications can now be deployed to Service Fabric managed clusters as an ARM resource. With ARM application deployments, you do not have to wait for the cluster to be ready before deploying; application registration, provisioning, and deployment can all happen in one step. Using ARM is the best way to manage your application lifecycle.
+* [Disk encryption](https://docs.microsoft.com/azure/service-fabric/how-to-enable-managed-cluster-disk-encryption?tabs=azure-powershell) - Disk encryption can now be enable on the nodes in a Service Fabric managed cluster using the Azure Disk encryption capability for virtual machine scale sets through Azure Resource Manager (ARM) templates.
+* [Automatic OS image upgrades](https://docs.microsoft.com/azure/service-fabric/how-to-managed-cluster-configuration#enable-automatic-os-image-upgrades) - You can now opt into Virtual Machine Scale Set automatic OS image upgrades for your Service Fabric managed cluster. If a new OS version is available, the cluster node types will be upgrade one at a time.
+* [VMSS Managed Identities](https://docs.microsoft.com/azure/service-fabric/how-to-managed-identity-managed-cluster-virtual-machine-scale-sets) - Each node type in a Service Fabric managed cluster is backed by a virtual machine scale set. To allow managed identities to be used with a managed cluster node type, a property vmManagedIdentity has been added to node type definitions containing a list of identities that may be used, userAssignedIdentities.
+* [NSG rule configuration](https://docs.microsoft.com/en-us/azure/service-fabric/how-to-managed-cluster-configuration#networking-configurations) - You can now customize Network Security Group rules.
+
+## Known Issues
+
+### ARM application deployments
+
+* Stateless service instance count cannot be updated after initial deployment.
+* When redeploying an application, the services must first be deleted through ARM.
+* When using the PowerShell cmdlets, the GET application command may fail.
+
+## Upcoming Features
+
+* Application managed identities for apps deployed to a Service Fabric managed cluster.
+* Service Fabric managed clusters which span across availability zones.
+* Auto scale the number of nodes in a cluster based on performance and load metrics.
+* Azure portal support for create and manage experiences.
+* Reverse proxy support.
+* Manual upgrade mode support.
+
+For more info, see the [Service Fabric managed cluster project](https://github.com/microsoft/service-fabric/projects/17).
+
+## Resources
+
+* [Documentation](https://docs.microsoft.com/azure/service-fabric/overview-managed-cluster)
+* [Deployment Quickstart](https://portal.azure.com/#create/Microsoft.Template/uri/https%3A%2F%2Fraw.githubusercontent.com%2FAzure-Samples%2Fservice-fabric-cluster-templates%2Fmaster%2FSF-Managed-Standard-SKU-1-NT%2Fazuredeploy.json) 
+* [Sample Cluster Templates](https://github.com/Azure-Samples/service-fabric-cluster-templates)