Microsoft 365 Alert – Service Degradation – Microsoft Teams – Users see multiple impact scenarios for Microsoft Copilot (Microsoft 365) functionalities in Microsoft Teams – RESOLVED

16/04/2026 9:20:00 AM

NHSmail Reference: INC46800845

Microsoft Reference: TM1281224

Issue Status: RESOLVED

Issue Description: Users see multiple impact scenarios for Microsoft Copilot (Microsoft 365) functionalities in Microsoft Teams.

More info: The following confirmed impact scenarios are:

– Facilitator not being added to Microsoft Teams meetings
– Failures when trying to initiate a Teams group chat with Copilot
– Failures when adding or removing Teams apps that utilize resource specific consent permissions.

Final Update: 21/04/2026 8:48:00 AM– Microsoft has confirmed that their configuration change to improve performance across the affected service infrastructure has remediated impact.

Scope of impact: Your organization is affected by this event, and users experience degradation for multiple Microsoft Copilot scenarios in Microsoft Teams. This section may be updated as the investigation progresses.

Root cause: The service infrastructure that interacts with and utilizes the affected Copilot scenarios is operating in an unhealthy state, resulting in impact.

Next steps: Microsoft are analyzing the offending service infrastructure to isolate why it began to operate in an unhealthy state and what further performance changes they can implement to ensure similar impact scenarios don’t occur in the future.