Microsoft 365 Alert – Service Degradation – Microsoft Teams – Users can’t use the Walkie Talkie app in any channel in the Microsoft Teams mobile app – RESOLVED

Announcements Arpan Das

26/11/2025 09:06:00 AM

NHSmail Reference: INC46691032

Microsoft Reference: TM1189857

Issue Status: RESOLVED

Issue Description: Users couldn’t use the Walkie Talkie app in any channel in the Microsoft Teams mobile app.

Current Update: 26/11/2025 09:09:00 AM – Microsoft have identified that a portion of Microsoft Teams infrastructure responsible for processing requests to access the Walkie Talkie app experienced an issue resulting in requests failing to reach the service. They have restarted the affected portion of infrastructure and confirmed requests are now succeeding and impact was successfully remediated for all users.

Scope of impact: Your organization was affected by this event, and all users couldn’t use the Walkie Talkie app in any channel in the Microsoft Teams mobile app.

Root cause: A portion of Microsoft Teams infrastructure responsible for processing requests to access the Walkie Talkie app experienced an issue resulting in requests failing to reach the service.

Next Steps: Microsoft are investigating the affected portion of infrastructure to better understand why requests were failing and prevent similar future impact.