Microsoft 365 Alert – Service Degradation – Microsoft 365 Copilot Chat – Some users may be intermittently unable to access Microsoft 365 Copilot Chat in Outlook on the web – RESOLVED

Announcements Sharmista Mohanta

14/08/2026 09:05:00 AM

NHS.net Connect Reference: INC46909443

Microsoft Reference: CW1454295

Issue Status: RESOLVED

Issue Description: Users may be intermittently unable to access Copilot Chat in Outlook on the web.

More info: When some users attempted to access Copilot Chat in Outlook on the web, they may have intermittently received an error that stated, “Something went wrong. An error occurred. Please try again.”

Final Update: 17/08/2026 09:00:00 AM – Microsoft’s investigation identified a misconfiguration with the Agent Builder feature, which caused users to intermittently be unable to access Copilot Chat in Outlook on the web. They disabled this configuration within the feature and confirmed with previously affected users that impact is remediated.

Scope of impact: Impact was specific to some users who attempted to access Copilot Chat in Outlook on the web.

Root cause: A misconfiguration with the Agent Builder feature, which caused users to intermittently be unable to access Copilot Chat in Outlook on the web.

Next steps: To help prevent similar impact in the future, they are further reviewing the underlying cause of the misconfiguration.