I believe it’s related to Teams app version as they are running Teams app, which will require the version is matched between each other.
Current troubleshooting suggestion:
1. Check Teams app version for both devices from Teams admin center.
The latest Teams app version can be found here Release notes for Microsoft Teams Rooms - Microsoft Teams
If they are not latest version, even they are not same version, please update both devices to latest teams app version.
YeaA30 example:
CTP18 example:
Check Teams Rooms App is up to date Print
Modified on: Fri, 30 Jan, 2026 at 1:33 PM
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