ARM lock memo

Author: Julia Shimanskiy

articles/virtual-machines/flexible-virtual-machine-scale-sets-migration-resources.md

@@ -156,17 +156,9 @@ Use the standard VM APIs and commands to retrieve instance Boot Diagnostics data
 Use extensions targeted for standard virtual machines, instead of extensions targeted for Uniform orchestration mode instances.
 
 
+### Protect instances from delete
 
-
-
-
-
-
-
-
-
-
-
+Virtual machine scale sets in Flexible orchestration mode do not currently have instance protection options. If you have autoscale enabled on a virtual machine scale set, some VMs might be at risk of deletion during the scaling in process. If you want to protect certain VM instances from deletion, use [Azure resource manager lock](../azure-resource-manager/management/lock-resources.md).