First of all, make sure that you are connected to your ZOOM account.

1st Step : Go to the online session.

Click on the Calendar > Select the online session > Press "Manage bookings".

Step 2 : Connect to the livestream.

Click on "Connect to the livestream".

A ZOOM tab will open automatically > Click on "Open Zoom.us".

You will then either be directly connected to your ZOOM meeting room or you will have to connect to your ZOOM account with your login and password.