Without precautions, meetings that are designed to bring people together could be attended by a person who is not invited.
Disruptions typically occur when meeting information is made open to the public. A user could post a private meeting link on social media, share their virtual classroom information, and more. But when these links are out on social media or other public forums, that makes your meeting completely public and anyone with the link can join it.
Here are a few easy ways you can help prevent disruptions:
Tips to prevent disruptions
- Use the right Zoom solution for your need: If you’re specifically hoping to use Zoom to host a virtual event with people you may not know, make sure to steer your attention from Zoom Meetings to Zoom Webinars or Zoom Events — products designed specifically for digital events.
- Avoid using your Personal Meeting ID (PMI): Your PMI is basically one continuous meeting and you don’t want outsiders crashing your personal virtual space after your designated meeting is over.
- Manage screen sharing: You do not want random people in your public session taking control of the screen and sharing unwanted content with the group. You can restrict this — before the meeting and during the meeting in the host control bar — so that you’re the only one who can screen share. If you disable screen sharing, the Whiteboard setting will be automatically disabled as well.
To prevent participants from screen sharing during a call, using the host controls at the bottom, click the arrow next to “Share Screen” and then go to “Advanced Sharing Options.” Under “Who can share?” choose “Only Host” and close the window.
without precautions, meetings that are designed to bring people together could be attended by a person who is not invited.
Disruptions typically occur when meeting information is made open to the public. A user could post a private meeting link on social media, share their virtual classroom information, and more. But when these links are out on social media or other public forums, that makes your meeting completely public and anyone with the link can join it.
Enable the Waiting Room
The Waiting Room is an important feature for securing a Zoom Meeting. Just like it sounds, the Waiting Room is a virtual staging area that stops your guests from joining until you’re ready for them. It’s almost like the velvet rope outside a nightclub, with you as the bouncer carefully monitoring who gets let in.
Meeting hosts can customize Waiting Room settings for additional control, and you can even personalize the message people see when they hit the Waiting Room so they know they’re in the right spot. This message is really a great spot to post any rules/guidelines for your event, like who it’s intended for.

The Waiting Room is an effective way to screen who’s trying to enter your Zoom session and keep unwanted guests out. When you disable “Join before host” in your settings, a Waiting Room will automatically greet your guests until you’ve started the meeting.
Keep Zooming responsibly
We hope these security features will help you continue to host safe and successful Zoom Meetings. Security is a key value for us at Zoom and will continue to help guide new product updates. We’re committed to being a platform users can trust — with their online interactions, information, and business.
To learn more about Zoom privacy and security, explore our Trust Center.
Source: https://blog.zoom.us/keep-uninvited-guests-out-of-your-zoom-meeting/