Addressed EEE doc task #25250249

Updated doc as per the inputs on - https://msazure.visualstudio.com/One/_workitems/edit/25250249

Author: AbhishekMallick01

articles/backup/backup-azure-vm-backup-faq.yml

@@ -4,7 +4,7 @@ metadata:
   description: In this article, discover answers to common questions about backing up Azure VMs with the Azure Backup service.
   ms.topic: faq
   ms.service: azure-backup
-  ms.date: 03/27/2025
+  ms.date: 05/12/2025
   author: jyothisuri
   ms.author: jsuri
 
@@ -157,6 +157,12 @@ sections:
           - **Retention of monthly backup points**: 1188 months
           - **Retention of yearly backup points**: 99 years 
 
+      - question: Can I back up a VM disks that're created in the Azure Classic Storage?
+        answer: |
+          No, the support for disks created in Azure Classic Storage is no longer available. To ensure continued functionality, you must migrate these disks to Azure Resource Manager (ARM) Storage. Also, Classic Storage accounts can't support ARM-based Virtual Machines (VMs), and no workarounds exist to enable compatibility.
+
+          >[!Important]
+          >Support for backup of all Classic VMs is planned for deprecation from September 2025. We recommend that you migrate the Classic VMs and associated disks to ARM Storage before this timeline to avoid disruptions.
   - name: Restore
     questions:
       - question: How do I decide whether to restore disks only or a full VM?