Start by checking that you are logged out of both your Sunet Zoom account and the desktop client. Go to the Mid Sweden University Zoom via the web browser and choose Sign in to a new account. Put in your Miun log in information and follow the instructions on your screen. Remember to confirm the move via the email sent to you from Zoom.
Your meeting id will be the same at both the Sunet and the Miun domain, but you must replace the links to the meeting if you have already distributed them to students or colleagues.