Added abbreviations and a Note

Author: jasminemehndir

articles/backup/backup-azure-immutable-vault-how-to-manage.md

@@ -3,7 +3,7 @@ title: How to manage Azure Backup Immutable vault operations
 description: This article explains how to manage Azure Backup Immutable vault operations.
 ms.topic: how-to
 ms.service: azure-backup
-ms.date: 11/11/2024
+ms.date: 03/12/2025
 author: jyothisuri
 ms.author: jsuri
 ms.custom: engagement-fy24, ignite-2024
@@ -13,9 +13,9 @@ ms.custom: engagement-fy24, ignite-2024
 
 This article describes how to manage Azure Backup Immutable vault operations for Recovery Services vault and Backup vault.
 
-[Immutable vault](backup-azure-immutable-vault-concept.md) can help you protect your backup data by blocking any operations that could lead to loss of recovery points. Further, you can lock the Immutable vault setting to enable WORM storage immutability and make it irreversible to prevent any malicious actors from disabling immutability and deleting backups.
+[Immutable vault](backup-azure-immutable-vault-concept.md) can help you protect your backup data by blocking any operations that could lead to loss of recovery points (RP). Further, you can lock the Immutable vault setting to enable WORM storage immutability and make it irreversible to prevent any malicious actors from disabling immutability and deleting backups.
 
->[!Note]
+>[!NOTE]
 > Immutable WORM storage is currently in GA for Recovery Services Vaults in the following regions: West Central US, West Europe, East US, North Europe, Australia East 
 
 ## Enable Immutable vault
@@ -98,6 +98,9 @@ However, increasing the retention of backup items that are in suspended state is
 
 Let's try to stop backup on a VM and choose **Retain as per policy** for backup data retention.
 
+>[!NOTE]
+> When you stop backups and retain them as per policy, the last RP is saved indefinitely to ensure recovery against any ransomware scenarios. You need to manually delete this RP after the backup policy expires if you want to stop incurring Protected Instance (PI) charges.
+
 :::image type="content" source="./media/backup-azure-immutable-vault/attempt-to-increase-retention-of-backup-items-in-suspended-state.png" alt-text="Screenshot shows an attempt to increase retention of backup items in suspended state.":::
 
 Now, let's go to **Modify Policy** and try to increase the retention of daily backup points to *45 days*, increasing the value by *5 days*, and save the policy.