TM1199346: Microsoft Teams Service Health Incident (Service Restored)

[365 Service Alert]

Users may be unable to answer PSTN calls from call queues using any Microsoft Teams client.                                                                                                                                                                                                                 

Users may be unable to answer PSTN calls from call queues using any Microsoft Teams client ID: TM1199346 Issue type: Incident Status Service Restored Impacted services Microsoft Teams Details Title: Users may be unable to answer PSTN calls from call queues using any Microsoft Teams client User impact: Users may have been unable to answer PSTN calls from call queues using any Microsoft Teams client. More info: When answering PSTN calls from call queues, affected users experienced calls that remained stuck in a loading state, preventing connection establishment. While we worked on a fix, non-Virtual Desktop Infrastructure (VDI) users could disable the setting (Settings, Devices, “Sync device buttons”) as a temporary remediation. For optimized VDI users that didn't have the option to toggle the "Sync device buttons" setting, some users could work around this impact by accepting PSTN calls using a non-human interface device (HID). Final status: We’ve deployed the fix to the affected environments and verified with affected users that this action successfully remediated the problem. Scope of impact: Impact was specific to some users attempting to answer PSTN calls from call queues using any Microsoft Teams client. Start time: Wednesday, December 17, 2025, at 3:34 PM UTC End time: Friday, December 19, 2025, at 8:00 PM UTC Root cause: A recent service update that intended to address an unrelated service problem introduced an impacting code regression that was preventing users from answering PSTN calls from call queues using the Microsoft Teams client. Next steps: - We’re investigating how the recent service update intended to address an unrelated issue introduced a code regression that prevented users from answering PSTN calls from call queues using the Microsoft Teams client, to help prevent this problem from occurring again. This is the final update for the event. Is this message helpful? Did you find this email helpful? Yes No To customize what’s included in this email, who gets it, or to unsubscribe, set your Service health preferences. If you are receiving this email because your Admin added you as a recipient, please contact your Admin to unsubscribe. Privacy Statement Microsoft Corporation, One Microsoft Way, ​Redmond, WA 98052​