Learn Editor: Update blob-backup-configure-tutorial.md

Author: vaibhav3301

articles/backup/blob-backup-configure-tutorial.md

@@ -22,6 +22,9 @@ Before you configure blob vaulted backup, ensure that:
 - You have a Backup vault to configure Azure Blob backup. If you haven't created the Backup vault, [create one](blob-backup-configure-manage.md?tabs=vaulted-backup#create-a-backup-vault).
 - You assign permissions to the Backup vault on the storage account. [Learn more](blob-backup-configure-manage.md?tabs=vaulted-backup#grant-permissions-to-the-backup-vault-on-storage-accounts).
 
+> [!CAUTION]
+> *Azure Backup is not supported for Storage Accounts enabled with network security perimeter. We recommend not associating an account with network security perimeter if you have backups enabled or if you plan to use Azure Backup.*  
+> 
 ## Before you start
 
 Things to remember before you start configuring blob vaulted backup: