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

Title: Some users may be unable to access links to other apps provided by Microsoft 365 Copilot Chat prompts User impact: Users may have been unable to access links to other apps provided by Copilot Chat prompts. More info: Users may have received an error or were directed to a page that never loaded 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 status: We've 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. We've validated from our monitors that impact is remediated. Scope of impact: This issue impacted users attempting to click or access app links provided by Copilot Chat prompts who may not be redirected as expected. Start time: Wednesday, April 29, 2026, at 12:00 AM UTC End time: Tuesday, May 12, 2026, at 1:30 PM UTC Root cause: A new update to increase the number of URLs allowed when routing universal links had introduced a code error, which resulted in users being unable to access app links provided by Copilot Chat prompts. Next steps: We're 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. This is the final update for the event.

Title: Some users may be unable to access links to other apps provided by Microsoft 365 Copilot Chat prompts User impact: Users may be unable to access links to other apps provided by 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 Current status: Our deployment of a code fix to address a code error causing users to be unable to access links to other apps provided by Copilot Chat prompts is at 10 percent saturation but progressing slower than initially anticipated. At the current rate, we believe full saturation will occur by Sunday, May 17, 2026, and we are determining what actions we can take to expedite our deployment to affected users. 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. Start time: Wednesday, April 29, 2026, at 12:00 AM UTC Root cause: A new update to increase the number of URLs allowed when routing universal links has introduced a code error, which results in users being unable to access app links provided by Copilot Chat prompts. Next update by: Wednesday, May 13, 2026, at 8:00 PM UTC

Title: Some users may be unable to access links to other apps provided by Microsoft 365 Copilot Chat prompts User impact: Users may be unable to access links to other apps provided by 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 Current status: During our internal testing of a new update to increase the number of URLs allowed when routing universal links, we identified that a code error was introduced which results in users being unable to access links to other apps generated by Copilot Chat prompts. We've created and completed validations of a code fix to remediate impact, and we anticipate our code fix reaching all affected users by Wednesday, May 13, 2026. We aim to provide updates on our timeline to remediation as the deployment progresses. 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. Start time: Wednesday, April 29, 2026, at 12:00 AM UTC Root cause: A new update to increase the number of URLs allowed when routing universal links has introduced a code error, which results in users being unable to access app links provided by Copilot Chat prompts. Next update by: Thursday, May 07, 2026, at 8:00 PM UTC