Merge pull request #92426 from peterpogorski/vmss-auto-os-sf-silver

Vmss auto os sf silver

Author: PRMerger15

articles/service-fabric/service-fabric-patch-orchestration-application.md

@@ -24,8 +24,11 @@ ms.author: brkhande
 > [!IMPORTANT]
 > As of April 30, 2019, Patch Orchestration Application version 1.2.* is no longer supported. Be sure to upgrade to the latest version.
 
+> [!NOTE]
+> Getting [automatic OS image upgrades on your virtual machine scale set](https://docs.microsoft.com/azure/virtual-machine-scale-sets/virtual-machine-scale-sets-automatic-upgrade) is the best practice for keeping your operating system patched in Azure. Virtual Machine Scale Set based automatic OS image upgrades will require silver or greater durability on a scale set.
+>
 
-Getting [automatic OS image upgrades on your virtual machine scale set](https://docs.microsoft.com/azure/virtual-machine-scale-sets/virtual-machine-scale-sets-automatic-upgrade) is the best practice for keeping your operating system patched in Azure. Patch Orchestration Application (POA) is a wrapper around the Azure Service Fabric Repair Manager service, which enables configuration-based OS patch scheduling for non-Azure hosted clusters. POA isn't required for non-Azure hosted clusters, but scheduling patch installation by update domain is required to patch Service Fabric cluster hosts without incurring downtime.
+ Patch Orchestration Application (POA) is a wrapper around the Azure Service Fabric Repair Manager service, which enables configuration-based OS patch scheduling for non-Azure hosted clusters. POA isn't required for non-Azure hosted clusters, but scheduling patch installation by update domain is required to patch Service Fabric cluster hosts without incurring downtime.
 
 POA is a Service Fabric application that automates operating system patching on a Service Fabric cluster without incurring downtime.