The account owners and administrators are able to block users authenticated with specific domains from participating in meetings and webinars hosted by their accounts, as an additional measure of security. If authentication profiles are also enabled, then the user who joins the webinar or meeting must also meet the authentication profile in addition to not being on any other domain’s block list.

Prerequisites for blocking users in specific domains

• Pro, Business, Education, or Enterprise account
• Zoom desktop client
  • Windows: 5.7.0 or higher
  • macOS: 5.7.0 or higher
  • Linux: 5.7.0 or higher
• Zoom mobile app
  • Android: 5.7.0 or higher
  • iOS: 5.7.0 or higher

How to enable a domain block list

Account

In order for all users in your account to be blocked from joining meetings and webinars in specific domains:

1. If you are an admin with permission to edit the account settings, you will need to sign into the Zoom web portal.
2. Click on Account Management, then select Account Settings to find the option.
3. From the Account Management page, click on Meetings.
4. Make sure you have the option to Block users in specific domains from joining meetings and webinars enabled under Security.
5. If it is not enabled, enable it by clicking the toggle next to it. Upon viewing the confirmation dialog, click Enable to ensure that the change was successful.
6. The following is an example of entering the domains that you wish to block from taking part in meetings and webinars.
7. You will then be prompted to save the configuration.
8. If you wish to make this setting mandatory for all users in your account please click on the lock icon , and then to confirm that you want to lock the account.

Group

In order to be able to block users from certain domains from joining meetings and webinars for a specific group of users:

1. Ensure that you are signed in as an administrator with the permission to edit Contacts and Channels . You can add contacts, create contact groups on the Zoom web portal.
2. Select User Management and then Group Management from the navigation panel.
3. On the left side of the screen, click on the name of the relevant group. On the right side of the screen, click Meetings.
4. Make sure that the option to Block users in specific domains from joining meetings and webinars is enabled under the Security tab.
5. If the setting is disabled, make sure that you enable it by clicking the toggle. If a verification dialog appears, you need to click Enable to confirm that the setting has been enabled.
   When an option is grayed out it indicates that it has been locked at the account level and that it will need to be changed there.
6. If you want to block domains from joining meetings or webinars, you need to enter the domains. You can add multiple domains using a comma in between, and/or use a wild card for listing domains.
7. Click Save.
8. would like to make this setting mandatory for all users within the group, just click the lock icon . If you wish, click Lock to confirm.nfirm the setting.

User

The following steps can be taken to block members of specific domains from attending meetings and webinars for your own use:

1. Log in to the Zoom web portal by using your email address and password.
2. Next, click the Settings link located in the navigation panel.
3. From the Meetings page, click on Edit.
4. Under Security, make sure that the “Block users from joining meetings and webinars in specific domains” option is enabled.
5. Clicking the toggle switch should enable the option if it is disabled. To make sure the change has been saved, click Enable to see if a verification dialog appears.
6.  It is possible that this option has been blocked at a group or account level if it is grayed out. You will need to contact your Zoom administrator.
7. If you want to prevent certain domains from joining meetings and webinars that you are hosting, you can add the domains here.
8. Click Save.