Microsoft 365 Alert – Service Degradation – Microsoft Copilot (Power Platform) – Users may be unable to begin onboarding for Microsoft Defender for Endpoint or Defender for Office 365 – RESOLVED

02/07/2026 09:59:00 AM

NHS.net Connect Reference: INC46867513

Microsoft Reference: PC1411478

Issue Status: RESOLVED

Issue Description: End users are receiving an error when attempting to chat with a Copilot agent.

More info: Impact was limited to Copilot agents embedded in websites.

End users may have received the following error messages:

Public websites – “Unable to start chat. Please refresh the page and try again.”

Demo websites – “The agent is not available right now
Try reloading the page. If the problem persists, contact your admin.”

Final Update: 02/07/2026 09:58:00 AM –Microsoft has identified a code change in a recent service update introduced a regression, resulting in impact. They rolled back the affecting service update and confirmed via testing and service health diagnostics that functionality has been restored.

Scope of impact: Some users attempting to begin onboarding for Microsoft Defender for Endpoint or Defender for Office 365 may be impacted.

Root cause: A code change introduced a regression.

Next steps: Microsoft are reviewing our standard service update procedures to avoid similar impact in the future.