Azure Monitor platform logs to immutable storage

Author: bwren

articles/azure-monitor/platform/resource-logs-collect-storage.md

@@ -15,6 +15,8 @@ ms.subservice: logs
 ## Prerequisites
 You need to [create an Azure storage account](../../storage/common/storage-account-create.md) if you don't already have one. The storage account does not have to be in the same subscription as the resource sending logs as long as the user who configures the setting has appropriate RBAC access to both subscriptions.
 
+> [!IMPORTANT]
+> To send the data to immutable storage, set the immutable policy for the storage account as described in [Set and manage immutability policies for Blob storage](../../storage/blobs/storage-blob-immutability-policies-manage.md).
 
 > [!IMPORTANT]
 > Azure Data Lake Storage Gen2 accounts are not currently supported as a destination for diagnostic settings even though they may be listed as a valid option in the Azure portal.