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Lost All Tasks in Planner – Twice in 3 Weeks

Tim Carlsen 0 Reputation points
2025-07-23T10:56:56.1166667+00:00

Hi,

Hoping someone here can help me out, because I’m honestly at a loss.

Twice now in the past three weeks, I’ve gone back into a Planner board I had set up for my team, only to find that about 90% of the content is just… gone.

The first time, I had just finished building everything: buckets, tasks, descriptions, checklists, labels, colour coding. Pretty much the full setup. I quickly jumped to another plan to double-check something, and when I came back, everything beyond the first 10 or so buckets had disappeared. Couldn’t find a way to restore it, even after checking forums and support articles. So I bit the bullet and rebuilt it all from scratch.

This time around, I spent even more time on it. We’re talking 22 buckets, 60+ checklist items, detailed descriptions, deadlines... everything. And now, again, all of it is gone when I open it in Teams this morning.

I’ve tried a bunch of things to fix or troubleshoot it:

Checked Planner for Web and Project for Web

Cleared filters

Refreshed the page and restarted Teams

Removed and re-added the Planner tab in Teams

Checked My Tasks and filters

Searched through Tech Community and Microsoft forums

No luck.

Is there a way to restore this kind of data? Do plans have to be “saved” before closing them? I thought everything was cloud-based and auto-saved, but now I’m second-guessing everything.

It’s honestly been super frustrating and I’ve now lost over 16 hours of work and planning. If there’s no way to recover it or prevent this from happening again, I might have to start looking at other planning tools outside of Microsoft Planner.

Any help or insight would be really appreciated.

Thanks,
T

Microsoft Teams | Microsoft Teams for business | Tasks | Other
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  1. Darren-Ng 1,425 Reputation points Microsoft External Staff Moderator
    2025-07-23T11:45:40.0633333+00:00

    Hi @Tim Carlsen

    Thank you for posting your question in the Microsoft Q&A forum.

    Based on your description, you have tried all the possible solutions, but the issue still persists.

    You should try to contact to your Admin to check Microsoft 365 Audit Logs:

    Admins can use the Microsoft 365 Compliance Center to:

    • Review audit logs for deletions or sync failures.
    • Identify whether the data was lost due to a system error or user action

    Besides that, I recommend you raise ticket to Microsoft Support so they can Investigate backend logs and Attempt recovery of lost Planner data. They can follow these steps as the link : Get support - Microsoft 365 admin.      

    If you are an Admin, you can raise support ticket: https://admin.microsoft.com/#/support/requests

    In the Microsoft 365 Admin Center > Support > Help & Support

    And if you're unsure who your Global Admin is, this guide may help How do I find my Microsoft 365 admin? - Microsoft Support   

    Unfortunately, as a Moderator, we do not have enough permission and do not have sufficient authority to intervene deeply to help you analyze and identify the root cause of the issue.

    I hope it helps and hope your issue can be resolved ASAP. If you have any other questions, feel free to reach out.

    If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

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