Addressed EEE doc ask #26108560

Added Immutable vault details as per inputs in WI https://msazure.visualstudio.com/One/_workitems/edit/26108560

Author: AbhishekMallick01

articles/backup/backup-azure-enhanced-soft-delete-configure-manage.md

@@ -2,7 +2,7 @@
 title: Configure and manage enhanced soft delete for Azure Backup
 description: This article describes about how to configure and manage enhanced soft delete for Azure Backup.
 ms.topic: how-to
-ms.date: 03/27/2025
+ms.date: 05/26/2025
 ms.service: azure-backup
 author: jyothisuri
 ms.author: jsuri
@@ -195,7 +195,7 @@ Here are some points to note:
 
 - Unregistering a container while its backup items are soft deleted (not permanently deleted) will change the state of the container to Soft deleted. 
 
-- You can re-register containers that are in soft deleted state to another vault. However, in such scenarios, the existing backups (that is soft deleted) will continue to be in the original vault and will be permanently deleted when the soft delete retention period expires. 
+-  You can reregister containers in a soft deleted state to a different vault. However, their existing backups stay in the original vault and get permanently deleted after the soft delete retention period ends. This process doesn’t work with Immutable vaults because the **Delete** operation isn't allowed, and you can’t access items in the Soft Delete state. Learn about [restricted operations for Immutable vault](backup-azure-immutable-vault-concept.md?tabs=recovery-services-vault#restricted-operations).
 
 - You can also *undelete* the container. Once undeleted, it's re-registered to the original vault.
 
@@ -263,4 +263,4 @@ For implementing other security measures on the vaults, see the following articl
 - [Immutable vault for Azure Backup](backup-azure-immutable-vault-concept.md).
 - [Private endpoints (v1 experience) for Azure Backup](private-endpoints-overview.md).
 - [Private endpoints (v2 experience) for Azure Backup](backup-azure-private-endpoints-concept.md).
-- [Secure by Default with Azure Backup (Preview)](secure-by-default.md).
+- [Secure by Default with Azure Backup (Preview)](secure-by-default.md).