Some users may be unable to make Public Switched Telephone Network (PTSN) calls through Microsoft Teams

Title: Some users may be unable to make Public Switched Telephone Network (PTSN) calls through Microsoft Teams
User impact: Users may be unable to make PTSN calls through Microsoft Teams.
Current status: We’re reviewing service monitoring telemetry to isolate the source of the issue and establish a fix.
Scope of impact: Impact is specific to some users who are served through the affected infrastructure.
Next update by: Tuesday, January 2, 2024, at 11:30 AM UTC