Add azure-virtual-desktop.md

I have added a note regarding devices that have not been able to synchronize with Intune for more than 60 days being hard deleted, as this information was not included in the public documentation.

memdocs/intune/fundamentals/azure-virtual-desktop.md

@@ -92,7 +92,8 @@ The following Windows 10 desktop device remote actions aren't supported/recommen
 
 ### Retirement
 
-Deleting VMs from Azure leaves orphaned device records in Intune. They'll be automatically [cleaned up](../remote-actions/devices-wipe.md#automatically-delete-devices-with-cleanup-rules) according to the cleanup rules configured for the tenant.
+- Deleting VMs from Azure leaves orphaned device records in Intune. They'll be automatically [cleaned up](../remote-actions/devices-wipe.md#automatically-delete-devices-with-cleanup-rules) according to the cleanup rules configured for the tenant.
+- VMs that have not synchronized with Intune for more than 60 days will have their device information automatically deleted.
 
 ### Known issues