Microsoft 365 Alert – Service Degradation – Microsoft Teams – Users’ SIP devices are unable to register and utilize Microsoft Teams PSTN calls – RESOLVED
30/10/2024 10:46:00 AM
NHSmail Reference: INC46583299
Microsoft Reference: TM921406
Issue Status: RESOLVED
Issue Description: Session Initiation Protocol (SIP) devices cannot register, make or receive Microsoft Teams calls
Current Update: 30/10/2024 10:46:00 AM – Microsoft have successfully reverted the offending change and confirmed that the issue is now resolved.
Scope of impact: Organization is affected by this event and any user using a SIP device is impacted.
Root cause: A new configuration change intended to introduce a new service feature inadvertently caused impact.
Next steps: Microsoft are reviewing their standard service and feature update procedures to prevent this issue from happening again.