How to keep your Zoom meeting secure?
You can require all meetings to be secured with one of the following security options: a passcode, Waiting Room, or Only authenticated users can join meetings. These options provide additional protection and privacy for your meetings and help prevent uninvited guests from joining.
If no security option is enabled, Zoom will automatically secure all meetings with Waiting Room.
How to enforce meeting security settings:
--> Sign in to the Zoom Web Portal.
--> In the navigation menu, click Account Management then Account Settings.
--> Click the Meetings tab.
--> In the Security section, click the toggles to enable or disable security settings for users on the account, including the Waiting Room and its customization, meeting passcodes and their complexity, and authentication profiles to control who can join meetings hosted by your account.
(Optional) To prevent all users in your account from changing a setting, click the lock icon next to a toggle, and then click Lock to confirm the setting.
See the full article here:
https://support.zoom.us/hc/en-us/articles/360059665892-Requiring-meetings-to-have-one-security-option