MCM - Updated cancel-sub for immutable blobs

Author: bandersmsft

articles/cost-management-billing/manage/cancel-azure-subscription.md

@@ -21,14 +21,26 @@ Although not required, Microsoft *recommends* that you take the following action
 * Shut down your services. Go to the [All resources](https://portal.azure.com/?flight=1#blade/HubsExtension/Resources/resourceType/Microsoft.Resources%2Fresources) page, and **Stop** any running virtual machines, applications, or other services.
 * Consider migrating your data. See [Move resources to new resource group or subscription](../../azure-resource-manager/management/move-resource-group-and-subscription.md).
 * Delete all resources and all resource groups. 
-    * To later delete a subscription, you must first delete all resources associated with the subscription.
+    * To later manually delete a subscription, you must first delete all resources associated with the subscription. 
+    * You may be unable to deleting all resources, depending on your configuration. For example, if you have [Immutable Blobs](../../storage/blobs/immutable-storage-overview.md#scenarios-with-version-level-scope). For more information, see the following [Immutable blobs](#immutable-blobs) section.
+        > [!NOTE]
+        > 30-90 days after you cancel a subscription, the subscription and all resources are automatically deleted, including immutable blobs.
 * If you have any custom roles that reference this subscription in `AssignableScopes`, you should update those custom roles to remove the subscription. If you try to update a custom role after you cancel a subscription, you might get an error. For more information, see [Troubleshoot problems with custom roles](../../role-based-access-control/troubleshooting.md#custom-roles) and [Azure custom roles](../../role-based-access-control/custom-roles.md).
 
 > [!NOTE]
 > After you cancel your subscription, you'll receive a final invoice for the usage that you incurred in the last billing cycle.
 
 If you cancel an Azure Support plan, you're billed for the rest of the month. Cancelling a support plan doesn't result in a prorated refund. For more information, see [Azure support plans](https://azure.microsoft.com/support/plans/).
 
+## Immutable blobs
+
+If you have any [Immutable Blobs](../../storage/blobs/immutable-storage-overview.md#scenarios-with-version-level-scope) under protection:
+
+- You can't delete the blob, storage account, resource group, or subscription.
+- You can cancel the subscription to mark all its resources, including immutable blobs, as inaccessible.
+- When the subscription is canceled, all data (including any locked blobs) is automatically deleted 30-90 days later.
+- You can create a [Azure support request](https://go.microsoft.com/fwlink/?linkid=2083458) to accelerate subscription cancellation and deletion. Azure support will also need email acknowledgment from the account administrator to cancel the subscription.
+
 ## Who can cancel a subscription?
 
 The table below describes the permission required to cancel a subscription.