I think I understand what @accesstelehealth is asking for since I’m probably after the same thing. This isn’t a question about starting a meeting but about joining a meeting someone else started as an SSO authenticated user. Basically, the join link doesn’t itself perform SSO login, so if the join URL is embedded in an SSO enabled site (not vanitydomain.zoom.us), then if a user is already SSO signed in to that site, clicking that link doesn’t let you join the meeting as the SSO user. The user needs to perform an extra step of going to https://vanitydomain.zoom.us/profile to force an SSO authenticated session, before the said embedded join link (in the external SSO site) will work properly.

Is there a way to streamline this so that once the user is SSO signed in to the external site, clicking one link will flow the SSO credential to the app and start the meeting?