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The Security icon in the meeting controls allows the host or co-host of a meeting to enable or disable options during a meeting to secure the meeting and minimize disruption during the meeting. The Security icon combines them all in one place for easy access during the meeting.
For public meetings, Zoom reminds users that when you share your meeting link on social media or other public forums, that makes your event public; anyone with the link can join the meeting.
A few tips to prevent others (unwanted) from joining your meeting:
Lock the Meeting: It’s always smart to lock your front door, even when you’re inside the house. When you lock a Zoom Meeting that’s already started, no new participants can join, even if they have the meeting ID and password (if you have required one). From the manage participants pane at very bottom, click on More, and select Lock meeting.
Enable Waiting Room: Enables Waiting Room for incoming new participants or to move current participants into the Waiting Room.
Hide Profile Pictures: Hide all profile pictures, including the host. Display names are shown instead.
Allow participants to:
Share Screen: Allows participants to share their screens.
Chat: Allows participants to use the chat function.
Rename Themselves: Allows participants to rename themselves from the Participants panel.
Unmute Themselves: Allows participants to unmute themselves without the host's permission.
Start Video: Allows participants to start their video in the meeting.
Remove Participant: Allows the removal of a participant from a meeting. The participant can not re-join unless Allow removed participants to rejoin is enabled in Meeting settings.
Suspend Participant Activities: Turn off all participant's video, audio, and ability to share their screen. Also lock the meeting to prevent participants from joining. This will apply to all participants including those joined using a Zoom Room.