Outage in Microsoft 365
Some users may be unable to access links to other apps provided by Microsoft 365 Copilot Chat prompts
Resolved Minor
April 28, 2026 - Started 27 days ago
- Lasted 15 days
Incident Report
Summary AI Generated
Microsoft 365 Copilot Chat users experienced issues accessing links to other apps, receiving errors or encountering pages that never loaded when clicking on app links generated by Copilot prompts. The issue affected Copilot Chat across multiple Microsoft services including Teams, Word, Excel, PowerPoint, Outlook, and OneNote. Microsoft identified the root cause as a code error introduced during an update to increase URL routing capacity, developed a fix, and began deployment, though the rollout progressed slower than anticipated with an extended timeline for full resolution.
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
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Latest Updates ( sorted recent to last )
18 days ago - at 05/07/2026 06:41PM
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
21 days ago - at 05/04/2026 07:17PM
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
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