Title: Some users’ calls to a Microsoft Teams Auto attendant from any Session Initiation Protocol (SIP) device may have failed
User impact: Users’ calls to a Microsoft Teams Auto attendant from any SIP device may have failed.
Final status: While monitoring the final phase of redeployment, we successfully concluded a revert of the build versions containing the impacting configuration issue, which we executed in parallel to expedite resolution. We subsequently confirmed via service monitoring telemetry that impact to end users has been remediated. We will continue to monitor the build redeployments to ensure they complete as expected, to reduce the likelihood of the issue reoccurring.
Scope of impact: This event may have impacted some users who call a Microsoft Teams Auto attendant from a SIP device.
Start time: Thursday, September 21, 2023, at 11:00 AM UTC
End time: Thursday, September 28, 2023, at 12:34 PM UTC
Root cause: A deployment made to address an unrelated event inadvertently introduced a misconfiguration, resulting in the impact.
Next steps:
– We’re reviewing our service update deployment and provisioning procedures to help prevent this problem from happening again.
This is the final update for the event.
