Each mailbox can be added to the Zulip ecosystem, and only same-domain users can collaborate in our Zulip integration.

Adding a new user to Zulip

• Go to the Admin Panel.

• Log in using your Admin username and password.
• Click on Zulip in the menu bar.
• Select the desired domain from the drop-down.
• Click on the Add button.

• A new window with a list of users from the domain will show.
• Select the users you wish to activate Zulip for. 
• Click on the Allow button. Allow up to 5 minutes for the system to add the users to the Zulip ecosystem.

• The allowed users on Zulip will show in the list.