during team meeting, someone turned on RTT, how to turn it off?

To turn off Real-Time Text (RTT) during a Microsoft Teams meeting, you can follow these steps:

1. If you are the meeting organizer or have the necessary permissions, you can disable RTT in the Teams admin center or through PowerShell.
2. In the Teams admin center, navigate to Meetings > Meeting policies. Select the policy you want to modify or create a new one, then toggle the Real-time-text (RTT) setting to Off and select Save.
3. If you prefer using PowerShell, you can run the following command:

      Set-CsTeamsMeetingPolicy -Identity <policy name> -RealTimeText Disabled
   

To prevent RTT from being turned on in the future, ensure that the RTT setting is disabled in the meeting policies as described above. This will apply to all users under that policy.

References:

• Manage Real-Time Text (RTT) in Teams for users in your organization
• Manage whether your users can use RTT in Teams meetings and group calls