Whiteboard storage location?

MC1024395 is indeed rolling out, but it's a gradual, tenant-by-tenant rollout that started in late 2024 and continues through 2025. Microsoft typically doesn't provide exact completion dates for these storage migrations. Your observation is correct - many tenants still show Whiteboards in OneDrive even after this announcement.

 Verify If Your Tenant Has the Update

• Check Message Center:

1. Go to the Microsoft 365 Admin Center.
2. Navigate to Health > Message Center.
3. Search for MC1024395 or filter by Whiteboard. If the message shows as "Completed," the update is applied.
4. Test it

Actions for M365 Admins

• Force Sync (If Partial Rollout):
•           If the update is partially applied, restart Teams or clear the cache:
•                    Windows: %appdata%\Microsoft\Teams\Cache
•                    Mac: ~/Library/Application Support/Microsoft/Teams/Cache
• Configure Retention Policies (Optional):
•                  To ensure compliance, set retention policies in the SharePoint site associated with the Teams channel.

Workaround (Until Full Rollout)

• Manually Move Whiteboards:

1. After creating a Whiteboard in Teams, open it in the web app.
2. Use the File menu to Save As and choose the Teams channel’s SharePoint folder.

• Use SharePoint Integration:
•        Attach existing SharePoint-stored Whiteboards to Teams posts via the Files tab.

My answers are voluntary and without guarantee!

Hope this will help you.