Make sure that "Only authenticated users can join meetings" is enabled
(the toggle should be blue with the circle on the right side). This should be the default setting as of Jan. 19, 2021. Next to "Sign in to Zoom.us (Default)", click Hide in the selection. Note: If someone outside the University may need to attend a class meeting, you can leave the default settings and keep the Zoom.us authentication option visible.
Now, when you go to create or edit meetings, you can check "Only authenticated users can join: Illinois email accounts" and save. Note: This change may take a few minutes to go through. Try opening up a new tab or restarting your browser.
This means that if students try to join the meeting with their personal Zoom account, they will see the message below. Note: Please direct students to log out of their Zoom desktop/mobile application and follow the instructions here to log in with their Illinois account: