Deleted Microsoft Plan

A Planner plan deleted while its Microsoft 365 Group remains intact cannot be recovered; Planner treats plan deletion as permanent, so the plan and its tasks must be recreated.^1^

What can still be salvaged

1. Check the group’s SharePoint site
   • Open the existing Microsoft 365 Group’s SharePoint site.
   • Review its Documents library for files that were uploaded independently to the group.
   • Also check the SharePoint recycle bin for missing files.
   Planner group files are stored in the associated SharePoint document library.^2^ Files found there can be reused, but they will not restore the deleted plan, tasks, assignments, labels, checklists, comments, or other task metadata. File survival is not guaranteed.
2. Create a replacement plan
   • Open Planner and create a new plan.
   • When prompted for the owning group, select the existing Microsoft 365 Group rather than creating another group.
   • Recreate the buckets and tasks using any surviving files, exports, screenshots, emails, or other records.
3. Ask an administrator to review audit activity if necessary
   • The administrator can search the Microsoft 365 audit log around the deletion time to identify who deleted the plan and when.^3^
   • Audit records can help reconstruct the timeline, but they cannot restore the plan.

The group-restoration exception does not apply here

If the Microsoft 365 Group itself had been deleted, an owner or tenant administrator could restore it within the 30-day soft-delete period, and restoring it would also restore its associated Planner content.^4^

Because the group in this case is still intact and only the plan was deleted, restoring or modifying the group will not bring the plan back.

References

1. Delete a task or plan | Microsoft Support
2. Frequently asked questions about Microsoft Planner | Microsoft Support
3. How to fix Planner error: You do not have access to this plan - Microsoft Q&A
4. Common management tasks for Microsoft 365 Groups