How do I lock my Zoom meeting room after all participants have arrived?
As host of a Zoom meeting you can lock the meeting room after all participants have arrived, to ensure no one else enters the room.
You can also use this feature to lock the meeting if you are making a recording and don't want to be interrupted.
Click "Participants" in the Zoom toolbar
Click "More" in the lower right corner of the Participants window, and select "Lock Meeting"
If at some point you wish to unlock the meeting, follow the same steps and select "Unlock Meeting" from the "More" menu in the Participants window.