Zoom has been around a while.  Many people already have used it, even if their company or school never had it as their official web conferencing platform.  Because we have had to suggest that all users be authenticated, it is important that you are arriving in the room with the correct account.

Inside the zoom app, check that you are logged in with your stonybrook.edu email address.

You can see that in the upper right.  If you are not, select switch account, and login through SSO.   (Not Google)