Title: Users were unable to make inbound or outbound calls via Public Switched Telephone Network (PSTN) in Microsoft Teams
User impact: Users were unable to make inbound or outbound calls via PSTN in Microsoft Teams.
Final status: After an extended period of monitoring and receiving multiple reports that the issue is no longer occurring, we’ve confirmed the issue has been resolved.
Scope of impact: Impact was specific to all users who were served through the affected infrastructure.
Scope of impact: Impact was specific to all users who were served through the affected infrastructure.
Start time: Thursday, March 28, 2024, at 11:50 AM UTC
End time: Thursday, March 28, 2024, at 12:20 PM UTC
Root cause: A network routing change has impacted PSTN calling. We’ll provide more details with the Post-Incident Report.
Next steps:
– We’re investigating the details of the networking change to better understand the contributing factors of impact and develop plans to prevent this happening again.
We’ll provide a Post-Incident Report within 5 business days.
