Microsoft 365 Alert – Service Degradation – Microsoft Copilot (Microsoft 365) – Users may intermittently receive no response from Microsoft Copilot (Microsoft 365) agents in Microsoft Teams – RESOLVED

Announcements Shagufta Naaz

06/01/2026 08:42:00 AM

NHSmail Reference: INC46743455

Microsoft Reference: CP1227436

Issue Status: RESOLVED

Issue Description: Users may intermittently receive no response from Copilot agents in Microsoft Teams.

Final Update: 16/02/2026 08:57:00 AM –The fix deployment completed, and has confirmed from Microsoft’s internal monitoring telemetry and user reports that impact has been remediated.

Scope of impact: Any user attempting to send chat messages to a Copilot agent in Microsoft Teams is intermittently impacted. This information may be updated as our investigation continues.

Root cause: A recent Copilot Studio update introduced an issue that is adversely affecting the installation of apps in Microsoft Teams with shared deep links and chat agent behavior.

Next Steps: Microsoft are reviewing and improving their update validation procedure to detect and prevent similar app installation issues in the future.