Microsoft 365 Alert – Service Degradation – Microsoft Copilot (Microsoft 365) – Some users may be unable to access the Microsoft Copilot (Microsoft 365) Chat – RESOVED

Announcements Arpan Das

06/08/2025 08:46:00 AM

NHSmail Reference: INC46597667

Microsoft Reference: CP1129465

Issue Status: RESOLVED

Issue Description: Users may be unable to access the Microsoft Copilot (Microsoft 365) Chat.

More info: Users receive a “Coming Soon” message, which prevents the user from accessing the Copilot Chat.

Final Update: 07/08/2025 08:35:00 AM – Microsoft have completed deploying our targeted fix to resolve the “Coming Soon” messages that were a result of internal service errors. Through internal telemetry and customer reports we”ve confirmed that impact was successfully remediated

Scope of impact: Some users attempting to access Copilot Chat are impacted.

Root cause: The mechanism responsible for syncing a user’s Copilot version was attempting to match an incorrect value after a recent update. When the mechanism couldn’t sync the values, a 404 error was returned resulting in the “Coming Soon” message, leading to impact

Next steps: To help prevent similar impact in the future, Microsoft are assessing optimizations they can make to their monitoring systems to expedite detecting failures resulting from this scenario.