Microsoft 365 · After the Deletion Date
Your teams keep sketching, planning and running workshops in Whiteboard. On Microsoft's published schedule, the Azure-based whiteboards still left in the legacy service were permanently deleted on October 16, 2026, and Microsoft says they cannot be recovered. Every board that made the move is now a .whiteboard file in the OneDrive of the person who started it, where retention policies, legal hold, DLP and basic eDiscovery can reach it. For credit unions, banks, and mortgage companies, the work now is finding those files, keeping the ones that matter, and making sure they outlast the next departure.
The schedule, now history
Microsoft published a four-step schedule for the legacy Azure storage. Three steps have passed. The fourth, the service shutdown, arrives on November 30, 2026.
Until September 25, 2026
Owners could trigger migration by opening Whiteboard on the web or in Teams, retry failed migrations, and export content. Administrators could inventory the boards and reassign the ones whose owners had left.
September 25, 2026
Migration ended. Azure boards still in the legacy service became read-only. They could still be viewed and exported until October 16.
October 16, 2026
Permanently deleted and cannot be recovered, in Microsoft's words. The same date was the final cutoff for restoring the Azure original of a board that did migrate: each original stayed restorable for about 90 days after its migration, never beyond October 16. It also retired the standalone Whiteboard apps.
November 30, 2026
The Azure Whiteboard service shuts down. Any script, runbook, or document that still points at the legacy service can be retired before then.
"Users can view and export those boards through October 16, 2026. On October 16, remaining Azure-based Whiteboards are permanently deleted and cannot be recovered. On November 30, 2026, the Azure Whiteboard service shuts down."
Microsoft Support, Migration of Whiteboards from Azure to OneDrive, re-read October 20, 2026Only boards still held in the legacy storage were in scope. Microsoft has stored new Whiteboard files for commercial customers in OneDrive since 2022, so most boards created since then were already in the right place. The exposure sat mainly in two groups: older boards that nobody opened during the migration window, and boards initiated on a Surface Hub or a Microsoft Teams Room device, which Microsoft's comparison page names as the case where a commercial account saved to Azure.
What remains is simpler to describe. Every board your people still have is a file in OneDrive, or an export someone saved. The OneDrive files are now ordinary Microsoft 365 content, and they need the same governance as the documents around them.
The question everyone asks first
Microsoft's answer is no. Its schedule describes the October 16 deletion as permanent and unrecoverable, and the restore option for migrated originals ran out the same day.
"After successful migration, the original Azure version can normally be restored for approximately 90 days by using the recovery experience or the Restore-Whiteboard cmdlet, but not beyond October 16, 2026."
Microsoft Support, Migration of Whiteboards from Azure to OneDrive, re-read October 20, 2026| Board | Where it is now | Who and what can reach it |
|---|---|---|
| A board migrated to OneDrive | A .whiteboard file in the creator's OneDrive | The owner, the people it is shared with, and the retention, legal hold, DLP and basic eDiscovery controls Microsoft lists for whiteboards in OneDrive |
| A board created since 2022 in Teams or on the web | In the creator's OneDrive, where it was saved from the start | The same retention, legal hold, DLP and basic eDiscovery controls Microsoft lists for whiteboards in OneDrive |
| A board exported before October 16 | The image or HTML file, wherever it was saved | Whoever holds the file, under the rules for that location |
| The Azure original of a migrated board | Restore window ended about 90 days after migration, by October 16, 2026 at the latest | The OneDrive copy stands in for it |
| A board left in Azure | Permanently deleted October 16, 2026 | Microsoft says it cannot be recovered |
If your team pulled the tenant inventory with Get-WhiteboardsForTenant before the deadline, keep the output. Microsoft noted that the data was precalculated and "may take approximately 2 weeks to reflect recent changes," so read it as a dated snapshot that can trail the tenant by about two weeks.
Filed with the date it was pulled, it records what the tenant held, give or take that lag. Keep the records of what migrated, what was exported and what was reviewed beside it. Where the inventory was skipped, the search in step one below becomes the baseline.
ABT manages Microsoft 365 tenants for credit unions, banks, and mortgage companies. A free security assessment includes finding the .whiteboard files in your tenant, naming their owners, and flagging the ones held in the OneDrive of people who have left.
Request the assessmentThe question for a regulated institution
That answer lives in your own retention schedule. Microsoft's documentation settles the practical half: where the boards are and which controls can reach them.
Microsoft is direct about where boards live: "Whiteboards are created in the OneDrive folder of the person who starts the whiteboard." Its data management page adds that whiteboards stored in OneDrive "are handled like any other content in OneDrive," and lists the data controls supported for them: retention policies, quota, legal hold, DLP, and basic eDiscovery, with the .whiteboard files "indexed for keyword and file type search."
That reverses the position before the migration. Microsoft's comparison page lists retention policies and e-discovery and data loss prevention among the features Azure whiteboards do not offer. The boards that moved now sit where Microsoft Purview eDiscovery and retention policies can reach them. Whether your existing policies actually include the OneDrive accounts where they sit turns on scope, licensing and configuration, and it is worth checking. Microsoft lists sensitivity labels, more eDiscovery support, and transferring a whiteboard when a user leaves the company as data controls planned for future releases, so treat today's eDiscovery support as basic.
So the useful version of the question is narrower and answerable in an afternoon: did anything happen on those boards that your retention schedule would cover had it happened in a document? Committee workshops, incident post-mortems, vendor selection sessions, and risk-ranking exercises all tend to produce a whiteboard and a set of decisions. If the decisions were written up elsewhere, the board is probably a working artifact. If the board is the write-up, it is doing the job of a record whatever it is called. Which of those applies is a call for your records and legal reviewers.
The case that needs the most attention is the one tied to people leaving.
Because a board lives in its creator's OneDrive, it follows that person's account. Microsoft's method for keeping a former user's boards is specific: "To preserve a former user's OneDrive files, including .whiteboard files, first give yourself access to their OneDrive, and then move the files you want to keep." It also notes that when whiteboard files are moved, "share links and permissions might not move."
The clock on that step is the deleted-user OneDrive retention setting, which an administrator sets anywhere from 30 to 3,650 days. A board that matters belongs on the offboarding checklist, reviewed well inside that period.
Watch
Whiteboard is a sharp instance of a permanent pattern: collaborative content accumulates in Microsoft 365 faster than anybody governs it, and the gap becomes visible when something forces an inventory. Usually that something is a discovery request or an examiner. This time it was a deletion date.
If the Whiteboard question caught your team by surprise, it is worth asking the same question of the rest of the estate before the next deadline picks the timing for you.
After October 16
Five steps, in this order. The first two find what survived. The last three keep it governed.
Microsoft documents that .whiteboard files in OneDrive are "indexed for keyword and file type search." Microsoft Purview eDiscovery searches OneDrive with a FileExtension property, so fileextension:whiteboard returns the boards held in the OneDrive accounts included in the search. Run it once against a board you know is there before relying on the count.
For one person at a time, the Whiteboards folder in their OneDrive and the board picker in Whiteboard show the same files.
Image exports, and HTML exports from Export-WhiteboardHtml, are what remains of any board that stayed in Azure. Find where they were saved, move the ones that matter into a governed location, and record which boards they came from.
Microsoft lists retention policies and legal hold among the data controls for whiteboards in OneDrive. Check that your retention policies include OneDrive accounts, and that any legal hold in force covers the OneDrive of the people involved.
When someone leaves, Microsoft's method is to give yourself access to their OneDrive and move the boards worth keeping. Check shared boards afterwards, because share links and permissions might not move with them.
Set the deleted-user OneDrive retention period, anywhere from 30 to 3,650 days, long enough for that review to happen.
Record what the tenant holds today, what any inventory pulled before the deadline showed, which boards migrated, and which were exported. Where someone decided at the time to let a board go and wrote it down, cite that record; where the history is missing, say so. A short dated note gives an examiner or auditor a clear account of what the institution can establish.
Where the inventory was skipped, the search from step one becomes the baseline for the boards that survived. Date it and file it with the note.
The standalone Microsoft Whiteboard apps for Windows, iOS and Android retired on October 16, 2026, and Microsoft says installed copies now display a retirement experience when opened. For work or school accounts, Whiteboard carries on in Microsoft Teams and on the web, and OneDrive-backed boards are unaffected.
Microsoft's checklist for that change covers managed-app catalogs, device images, software-deployment guidance, internal documentation, training, and helpdesk scripts. Surface Hub and Microsoft Teams Room devices deserve a separate look, since boards started on them are the ones Microsoft says saved to Azure.
How ABT helps
ABT is a Tier 1 Microsoft Cloud Solution Provider. We manage Microsoft 365 tenants and host Azure environments for credit unions, banks, and mortgage companies.
The Whiteboard question is small enough to answer quickly and easy to leave for later. The assessment covers it, and covers the wider question it belongs to: which collaborative content in your tenant nobody owns, nobody governs, and nobody could produce on request.
ABT also operates M365 Guardian, its managed security service for credit unions, banks, and mortgage companies. Learn about M365 Guardian.
Related reading
Microsoft lists eDiscovery among the features Azure whiteboards did not offer. This is what eDiscovery reach actually depends on, including the licensing rule that catches people out.
Read the guide
Boards that migrated sit where retention policies can reach them. Whether yours actually cover OneDrive turns on scope and configuration, which is worth checking now.
Read the guide
The companion question. Content retention decides what still exists; audit retention decides whether you can show what happened to it, and the two are licensed separately.
Read the guideOther Microsoft dates from the same month: Office LTSC 2021 end of support on October 13, 2026, Microsoft Publisher end of support, and the wider cluster of Microsoft support deadlines that month.
Answered from Microsoft's own documentation
Provenance
Every date, quotation and cmdlet name on this page was read directly from a Microsoft-owned page and checked again on October 20, 2026.
The boards that migrated before October 16 are files in their creators' OneDrive accounts. One search across those accounts tells you how many there are and whose they are, and a check of each owner's account shows which belong to people who have left.
Tell us a little about your environment and we will come back with what we would check first.
What should we look at? Optional.
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An ABT specialist will be in touch shortly. If an exam or records review is coming up, say so in your reply and we will move it to the front.
