Go to torontomu.zoom.us (external link) . Click on "Sign In" and enter your TMU credentials.
Download and install the Zoom desktop or mobile application.
The following instructions apply to mobile and desktop versions of Zoom, however the interface will slightly differ.
You will then be redirected back to the "Sign In with SSO" page.
You will now be logged into Zoom's desktop or mobile app. The meeting host will provide you a Zoom meeting link/invitation.