Microsoft 365 Alert – Service Degradation – Microsoft Teams – Users see autogenerated chats during Public Switched Telephone Network (PSTN) calling scenarios in Microsoft Teams – ONGOING

Announcements Shagufta Naaz

25/02/2026 08:25:00 AM

NHSmail Reference: INC46758255

Microsoft Reference: TM1238395

Issue Status: ONGOING

Issue Description: Users see autogenerated chats during PSTN calling scenarios and Call Queue or Auto Attendant calls in Microsoft Teams.

More info: When placing outbound PSTN calls or receiving inbound PSTN calls, users see a chat thread autogenerated in the Microsoft Teams desktop client and web app. This also affects Call Queue and Auto Attendant calls.

Current Update: 26/02/2026 8:40:00 AM – Microsoft has identified that their fix deployment has reached approximately 40 percent saturation throughout the affected environment, and they are anticipating it may complete by their next scheduled update, at which point they will monitor to confirm full remediation.

Scope of impact: This may affect all admins updating the MacOS Wi-Fi policy for users on build 6.2602.7.2001 forward through Microsoft Intune.

Root cause: A code issue in a recent deployment to the Microsoft Teams calling service introduced a compatibility complication between the affected calling scenarios and chats, which is causing the chats threads to unexpectedly autogenerate in the Microsoft Teams desktop client and web app.

Next update by: Thursday, February 26, 2026, at 8:00 PM UTC