Microsoft 365 Alert – Service Degradation – Microsoft 365 suite – Users may be unable to access Microsoft Copilot or experience degraded functionality with some features – RESOLVED

Announcements Arpan Das

05/12/2025 08:26:00 AM

NHSmail Reference: INC46701931

Microsoft Reference: MO1193592

Issue Status: RESOLVED

Issue Description: Users may be unable to access Microsoft Copilot or experience degraded functionality with some features.

More Info: Users may be unable to access Microsoft Copilot via:

– copilot.cloud.microsoft
– m365.cloud.microsoft
– Copilot button within the Edge browser
– Microsoft Copilot for Microsoft 365 app (app, client app, Win32 app)
– Microsoft Copilot for Microsoft 365 apps

Users may see the error message “Sorry, I wasn’t able to respond to that. Is there something else I can help with”

Final Update: 26/12/2025 10:56:00 AM – Microsoft has identified a recent policy change that impacted service traffic balancing, causing a high number of requests to be sent for processing in the affected environment, which resulted in throttling.

They have reverted this policy change in one of the affected EU environments and have seen a significant improvement in service health. They are now making the same change in all of the affected environments. They expect the change to be fully reverted within the next hour.