First, go to your course Tools and select Blackboard Collaborate Ultra.
A list of all the sessions appear. To join a session click on the dotted circle in the far right to access session details. Click on Join Course Room or Join Session.
Each session link is unique to the session and to the user. Do NOT share your link with other users to join.
If the session is recorded you can access the list of recordings after the sessions ends.
From the Blackboard Collaborate Ultra Tool , select the tool menu. Select Recordings for a list of all the recordings.