O365 - General
| 2026-08-05 | Status | Description |
|---|---|---|
| 02:47 PM |
|
Resolved Issue: - Users may have been unable to access Copilot Chat in the browser and may have encountered a 400 Request Header error. |
| 2026-08-04 | Status | Description |
|---|---|---|
| 07:46 AM |
|
Active Issue: - Users may be unable to access Microsoft Copilot Chat in the browser and may encounter a 400 Request Header error. As a temporary workaround, affected users may be able to restore access to Microsoft Copilot Chat by clearing their browser cookies and then trying again. |
No Issue
Outage
