Microsoft 365 Alert – Service Degradation – Microsoft 365 suite – Unable to open files in Office for the web or Microsoft Teams – RESOLVED

02/06/2026 08:50:00 AM

NHSmail Reference: INC46839935

Microsoft Reference: MO1329446

Issue Status: RESOLVED

Issue Description: Unable to open files in Office for the web or Microsoft Teams.

More info:Impacted Office Apps included, but were not limited to:
– Excel
– PowerPoint

When users opened documents, impacted users were shown the following error message “Office Online services aren’t available right now. We’re working to restore all services as soon as possible. Please check back soon.

Final Update: 02/06/2026 08:52:00 AM– Microsoft has confirmed through customer reports and service telemetry that the impact has been resolved, and the service has remained stable for an extended period of time. As the issue recovered without any specific engineering actions being implemented, engineer teams continue to investigate the underlying root cause so actions can be taken to prevent the issue from reoccurring.

Scope of impact: This issue could have impacted any user attempting to access Office Apps using Office for the web or Microsoft Teams.

Root cause: Microsoft are reviewing service telemetry, diagnostics logs and recent changes to isolate the root cause. We’ll provide more details within the Post-Incident Report.

Next steps : Microsoft are continuing to monitor the service and will complete a thorough post-incident review to help prevent similar issues in the future.

Microsoft will provide a preliminary Post-Incident Report within two business days and a final Post-Incident Report within five business days.