[Whiteboard] Legacy Whiteboard migration to OneDrive

🚨 The Signal: Microsoft Whiteboard is deprecating Azure-backed storage, requiring migration to OneDrive by September 25, 2026. Unmigrated whiteboards become read-only, then permanently deleted, posing a data loss risk if not actioned.

The Impact

Organisations with legacy Azure-based Whiteboards face data loss if administrators do not migrate them to OneDrive.

• Administrators: Must identify and migrate legacy Whiteboards to prevent data loss.
• End Users: Will lose access to unmigrated Whiteboards after October 16, 2026.
• Security Teams: Need to ensure data retention and recovery policies are met for Whiteboard content.

The Action

1. Identify legacy Azure-backed Whiteboards using Microsoft 365 admin tools or PowerShell.
2. Communicate migration requirements and deadlines to affected users.
3. Initiate migration of legacy Whiteboards to OneDrive-backed storage.
4. Verify successful migration and data integrity post-migration.
5. Export critical content from any Whiteboards that cannot be migrated before September 25, 2026.

Impact: high · Workload: OneDrive · Essential Eight: Regular Backups · ISM: ISM-1511, ISM-1515, ISM-1705, ISM-1706, ISM-1707, ISM-1708, ISM-1810, ISM-1811, ISM-1812, ISM-1813, ISM-1814