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

Announcements Arpan Das

09/12/2025 10:10:00 AM

NHSmail Reference: INC46701339

Microsoft Reference: CP1193544

Issue Status: RESOLVED

Issue Description: Some users may be unable to access Microsoft Copilot (Microsoft 364) or experience degraded functionality

Final Update: 01/01/2026 08:40:00 AM – Microsoft have reverted this policy change in one of the affected EU environments and have seen a significant improvement in service health. They’re now making the same change in all of the affected environments.

They’ve reverted this policy change in one of the affected EU environments and have seen a significant improvement in service health. They’re now making the same change in all of the affected environments.

Scope of impact: Impact is specific to users attempting to access Microsoft Copilot.

Our investigation indicates that the following region(s) are impacted by this issue: United Kingdom, Europe. This information may be updated as our investigation continues.

Additionally, users based within other regions whose organization(s) are located in Europe, may also be affected.