For meetings, the host can allow attendees to chat with everyone or with the host only.
Disabling in-meeting chat
You can turn chat for all of your meetings and webinars, if you do not want to use the chat feature in your meetings and webinars. This will prevent the host, co-hosts, and participants from chatting for any meetings you host. The Chat option will no longer appear in the Meeting Controls.
You can disable the Private Chat, which will prevent participants from sending messages to individuals instead of the entire group.
Sign in to the Zoom web portal.
In the navigation menu, click Settings.
Navigate to Chat option under In Meeting (Basic).
Click the Chat and Private Chat toggles to disable in-meeting chat.
Click Save Changes.
