In Webex Meetings and personal room meetings, the host and co-host can disconnect a participant from a meeting on a Board, Desk, or Room Series device. During Webex App meetings, everyone in the meeting can disconnect others.
1

In a meeting which you are hosting, access the call controls and tap the Participants button.

On a DX, MX, or SX Series device, the participants button is on your device or controller's home screen during a call.

2

Tap the person you want to disconnect.

3

Tap Remove from call .

4

Webex will remove the selected participant and let them know.