Microsoft 365 Alert – Service Degradation – Microsoft 365 Copilot Chat – Some users may be unable to access links to other apps provided by Microsoft 365 Copilot Chat prompts – RESOLVED

05/05/2026 08:46:00 AM

NHSmail Reference: INC46816658

Microsoft Reference: CW1300750

Issue Status: RESOLVED

Issue Description: Some users may be unable to access links to other apps provided by Microsoft 365 Copilot Chat prompts.

More info: Users may receive an error or be directed to a page that never loads when clicking links to other apps provided by Copilot Chat prompts.

This issue impacts any service where Copilot Chat can be utilized, which includes but may not be limited to the following:
• Microsoft Teams
• Word
• Excel
• PowerPoint
• Outlook
• OneNote

Final Update: 14/05/2026 08:32:00 AM– Microsoft has validated that our deployment of the fix to address code errors causing users to be unable to access links to other apps provided by Copilot Chat prompts has completed. They have validated from our monitors that impact is remediated

Scope of impact: This issue impacts users attempting to click or access app links provided by Copilot Chat prompts who may not be redirected as expected. This section may be updated as the investigation progresses.

Next steps: Microsoft are analyzing the impacting update to isolate why the code error wasn’t caught during our internal testing and validation stages. This analysis will help us to improve our update implementation processes moving forward to ensure similar impact scenarios don’t occur in the future.