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

Announcements Shagufta Naaz

06/01/2026 08:42:00 AM

NHSmail Reference: INC46743455

Microsoft Reference: CP1227436

Issue Status: ONGOING

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

Current Update: 06/01/2026 08:42:00 AM – Microsoft has determined that additional validations are required to ensure our fix to back-fill data necessary to facilitate responses from Copilot agents remediates all potential impact scenarios. This extended analysis and validation period will help us to ensure remediation once their fix is deployed.

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 update by: Friday, February 6, 2026, at 10:00 PM UTC