Title: Users with newly assigned numbers may be unable to place outbound calls in Microsoft Teams
User impact: Users with newly assigned numbers may have been unable to place outbound calls in Microsoft Teams.
More info: This issue may have affected users with Operator Connect and Teams Phone Mobile calling plans.
Users with existing phone numbers weren’t affected, unless they were assigned a new number or their number was updated.
Final status: We’ve completed our process of reprocessing affected numbers to be utilized in the old system and have applied our fix to utilize the old system while we correct the issue affecting the new system that resulted in impact. The issue is now resolved for all users.
Scope of impact: This issue may have affected any user with Operator Connect and Teams Phone Mobile calling plans attempting to place outbound calls in Microsoft Teams.
Start time: Wednesday, November 29, 2023, at 8:30 AM UTC
End time: Friday, December 1, 2023, at 9:42 PM UTC
Root cause: A recent change intended to route traffic to utilize a new system for calling caused newly assigned phone numbers to not be recognized by the new system, resulting in impact.
Next steps:
– We’re reviewing our change testing and validation procedures to identify how impact was missed and better prevent similar future occurrences.
This is the final update for the event.
