Microsoft 365 Alert – Service Degradation – Microsoft Copilot (Microsoft 365) – Users may see Frontier Copilot Agents for Word, Excel, and PowerPoint in Microsoft Teams and Exchange Online – RESOLVED

Announcements Arpan Das

17/11/2025 09:37:00 AM

NHSmail Reference: INC46685580

Microsoft Reference: CP1187825

Issue Status: RESOLVED

Issue Description: Users may see Frontier Copilot Agents for Word, Excel, and PowerPoint in Microsoft Teams and Exchange Online

More info: Users may see Word, Excel, and PowerPoint agents within Microsoft Teams and any client of Exchange Online in specific situations, even when the Frontier setting is disabled.

If users attempt to access the Frontier agents they will receive an error message.

Final Update: 24/11/2025 08:25:00 AM – Microsoft have confirmed that the fix has completed release and validated this issue has been remediated via internal testing and service telemetry

Scope of impact: Any user in the affected environment that utilizes Microsoft Teams or Exchange Online may have been affected by this event.

Root cause: A misconfiguration of a recent update resulted in some users seeing Frontier Copilot Agents for Word, Excel, and PowerPoint in Microsoft Teams and Exchange Online.

Next steps: Microsoft are continuing their analysis of the impacting configuration change to better identify and prevent similar impact in the future.