A moderator may give you a link to join a session. This link may give you participant, presenter, or moderator privileges. Your role in the session depends on the session moderator.
Open the link in your browser. ChromeTM or Firefox® gives you the best experience. For the best Blackboard Collaborate experience with your screen reader use Firefox and JAWS on a Windows® system. On a Mac® use Safari® and VoiceOver.
After the page loads, type your name and select Join Session.
If you have the Blackboard app, you can open the link on your mobile device and follow the directions to join the session from the app.
If this is your first time joining the session, complete the audio and video set up and add a profile picture. If enabled, you can also use the telephony feature to communicate with other users.
Source: Blackboard