07-10-2021 03:10:00 PM (BST)
Microsoft Reference : TM289868
Issue Status: RESTORED
Issue Description: Users may have experienced issues making or receiving PSTN calls through Microsoft Teams.
More info: Users dialing into audio conference meetings were also affected.
Additionally, users attempting to call Auto Attendant and Call Queue features may have experienced disconnects.
Some organizations which leverage Direct Routing may see a delay in recovery due to SBC (Session Border Controller) configurations. They may have marked connections to Microsoft services as down. These organizations will need to clear their cache by restarting the SBC or allow the cache to clear naturally.
Direct Routing is a way to provide a PSTN (Public Switched Telephone Network) connection to Microsoft Teams users, allowing them to place and receive external phone calls on any device using Teams.
Final Update – 07/10/2021 05:41:00 PM : After an extended period of monitoring, Microsoft confirmed this issue is resolved.