This guide covers measures you can take in order to prevent unwanted participants from joining your Zoom meetings or to restrict specific in-meeting features from being used by guests/participants. All of these measures can help prevent what is known as 'Zoom-bombing.'

Each security method is presented with the advantages (and disadvantages) of that method in order to assist you in choosing the appropriate security measure for your Zoom meeting environment.

Any of these settings can be enabled or disabled by signing in to your Zoom profile, located here:

Note: Any of the methods mentioned in this documentation can be applied to meetings that are already scheduled by editing the meeting settings or by changing your user settings before the scheduled meeting becomes active (or starts).

Adding Passwords to Previously Scheduled Meetings, or your Personal Meeting Room (User Settings)

Note: All meetings scheduled after 4/3 will have the password protection on by default, with the option allowing you to opt-out if you so choose.

Advantage: Passwords protect your meetings from randomly being 'Zoombombed'. Individuals with large amounts of previously scheduled meetings, especially recurring ones, should update these meetings with passwords in order to protect them.

Drawback: Users may be prompted to enter a password, before joining your meetings, because they have not received an updated join link or meeting invitation.

Refer to How Can I Find the Password for My Meeting? and How do I Edit My Existing Meeting?

Enforce Host Only Screen Sharing (In-Meeting and User Settings)

This method allows screen sharing only for the following participants: the meeting host (you), and alternate hosts/co-hosts. 

Advantage: This prevents participants from being able to share their screen at any time during your meeting. This is especially effective in an Academic Zoom meeting.

Drawback: This requires the host (and any co-host) to be actively paying attention to participants who may need to share their screen (i.e. vendors, sales representatives, staff members, etc.). If the host or co-host is not present, then participants will not be able to share their screen during the meeting. 

Instructions can be found in the following knowledge base article:  Zoom - How to set Screen Share to Host Only

Note: Adding alternate hosts when scheduling your meeting can help facilitate any screen sharing during your meeting.

Enforce Chat Restrictions (In Meeting and User Settings)

This restricts chat in your Zoom meetings so that participants are not allowed to chat, and can also prevent participants from having private one-on-one chats during the meeting.

Advantage: This prevents participants, especially students, from chatting within the meeting. This also helps prevent the sharing of information during quizzes, tests, polls, and any other scenario where you would not want your participants to be privately sharing information without your knowledge.

Drawback: Participants are not able to collaborate in chat during the meeting. If private chat functions are disabled, all chats would be public to the entire meeting, which can be difficult to manage if you have a large number of participants.

In Meeting - Click on the 'Security' button on the meeting control toolbar, and uncheck 'Chat'

User Settings - (

Disabling Whiteboarding and Annotations (User Settings)

This restricts the ability of participants to draw, or write, anything on top of the current screen sharing in the meeting.

Advantage:  Participants (malicious or otherwise) will not be able to deface the content you are currently screen sharing (writing, making innappropriate comments, etc).

Drawback: Participants are not able to easily collaborate on content being presented by making annotations. Note: this feature cannot be enabled from within an active Meeting

Remove the Ability for Participants to Unmute their Audio, or Video (In Meeting)

This is an in meeting feature, which allows the host to actively manage who is allowed to unmute thier audio, or video.

Advantage: If participants are being disruptive, either by unmuting the microphone and interrupting the meeting or by displaying innapropriate content (through their camera - virtual backgrounds, obscene pictures in the background, costumes, etc) - removing the ability for them to unmute themselves will mitigate this issues.

Drawback: Participants, who are not malicious, could remain muted (audio, or video) and not be able to turn it back on without the hosts intervention. Participants would need to send a chat (if enabled) to the host requesting their audio, or video, to be unmuted.