On November 4th at 7 pm, Microsoft reported that the issue affecting SIP (Physical Yealink Handsets) service was resolved. If any users continue to experience issues with their SIP devices please contact the IT Help Desk. Thank You.

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Previous Description (November 4, 2024 14:21):

Microsoft is currently experiencing a service disruption. This disruption is affecting users ability to sign into their Microsoft Teams physical phones (Yealink phones) and receive calls.

More info:

Users who are signed in can't make Microsoft Teams calls through SIP devices.

The impact is specific to a subset of users who utilize SIP devices in North America to access Microsoft Teams.

Affected services:
Session Initiation Protocol (SIP) devices

Status:
Microsoft Investigating