Hi @delrealneida,
This would depend on whether the following option is enabled against the Zoom account that created the meeting.
"My Profile --> Settings --> Meetings --> Security --> Only authenticated meeting participants and webinar attendees can join meetings and webinars"
This option can be used to restrict which domain are allowed to join the meeting (i.e. @university.edu.au).
Does this answer your question? If so, don’t forget to mark the reply as an accepted solution!
Alternatively, let me know if I can be of any further assistance?