Outgoing calling from Teams is down

Outgoing calls from Teams are currently resulting in errors (503 errors). Teams to Teams calling is working and incoming calls are working as well and Teams meetings. Severity 1 ticket is opened with Microsoft and are watching the MS Service notices to see if anything is posted.

11/14/2025 11:15 AM - Technical teams continue to try to assess the issue.

11/14/2025 12:48 PM - UWM engineers are waiting for feedback from vendors. All internal investigation on network and connectivity are not showing any errors or issues that would be the cause of this issue.

11/14/2025 1:35 PM - Continuing to wait for feedback from vendors as troubleshooting occurs.

11/14/2025 3:30 PM - No change in status – continuing to work with Microsoft and third party vendors regarding Teams outbound calling.

11/14/2025 4:30 PM - AT&T has escalated this issue with its technical teams and we continue to work with them. Further updates will be provided as they become available.

11/14/2025 10:00 PM - AT&T were able to track, acknowledge, and reset their routing issue. Teams outbound calls were tested and are again available for UWM.