Disappearing Planner Board

Hello @Horrell, Jane,

Thank you for sharing the details of your issue. 

I’ve reviewed the situation, and I want to assure you that this problem is not caused by anything on your side. It has been identified as a service incident by Microsoft and is currently being addressed.  

Here is the newest official information:

Title: Some users may be unable to view the Planner app in Microsoft Teams

User impact: Users were unable to view the Planner app in Microsoft Teams.

More info: As a way to enforce the efficiency of our fix, we recommend users to restart Microsoft Teams. If Planner still does not load after restarting Teams, we still recommend admins update the Planner assignment setting from "No one" to "Everyone" in the Microsoft Teams admin center (TAC) after clearing the cache and resetting sign in. Affected users can also use the Planner app web client, if they have access to it, to bypass impact.

Final status: We’ve confirmed the fix rollout has completed successfully, and customer validation indicates the issue is resolved.

Scope of impact: Impact was specific to some users who were served through the affected infrastructure attempting to utilize the Planner app in Microsoft Teams.

Start time: Wednesday, March 25, 2026, at 3:38 AM UTC

End time: Thursday, March 26, 2026, at 2:00 AM UTC

Root cause: The Planner app contained an incorrectly configured app definition value that resulted in an unintended change to the Planner app’s classification.

Next steps:

- We’re analyzing the affected infrastructure to identify opportunities for improvement that help prevent this issue from recurring.

- We'll provide a preliminary Post-Incident Report within two business days and a final Post-Incident Report within five business days.

To ensure the issue is properly tracked and addressed for your specific environment, I recommend that you contact your IT administrator and ask them to report the issue through the Microsoft 365 Admin Center.

By submitting the issue from the Admin Center, Microsoft’s backend support teams will be able to identify it as tenant‑specific, investigate further, and actively work on a resolution for your organization.

Please rest assured that Microsoft engineers are working diligently to resolve this issue as quickly as possible.

Thank you for your understanding and cooperation. If you have any additional questions or need further assistance, please feel free to let me know.

Best regards,  

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