You can edit the settings of a conference in your course. You can add new users to the conference, but you cannot remove any users who have already been invited.
When a conference has been recorded and the conference is concluded, you cannot edit the conference recording.
New users invited to a conference will not receive a notification in Canvas. However, depending on the user's notification settings, they may receive a notification via their preferred method(s). To notify users of a conference in Canvas, consider adding an announcement, assignment, or calendar event.
In Course Navigation, click the Conferences link.
Click the conference you want to edit. Click the Settings icon  and click the Edit link .