Microsoft 365 Alert – Service Degradation – Planner – Users are unable to open some projects in Microsoft Planner – RESOLVED

Announcements Sourav Nandi

19/07/2025 08:30:00 AM

NHSmail Reference: INC46606372

Microsoft Reference: PL1136094

Issue Status: RESOLVED

Issue Description: Users are unable to open some projects in Microsoft Planner.

Final Update: 21/08/2025 08:30:00 AM – Microsoft have successfully applied the fix and have confirmed that all affected projects have been restored.

Scope of impact: Your organization is affected by this event, and the issue impacts users opening some projects in Microsoft Planner.

Root cause: A latent code issue that manifests in edge cases when the portion of infrastructure that facilitates these Microsoft Planner project access requests is operating in highly leveraged state is resulting in corrupted projects, preventing them from opening.