Attendees can be removed from a course roster, provided they are not marked as attended, and the class start date has not passed. To remove an attendee from the roster:
Login to Studio
Click Administration > Courses
Locate the course title
Navigate to the Attendees section and click the blue trash can icon next to the names you wish to remove from the course. One license will be credited back to your account for each attendee removed.
If the trash can icon is gray, this feature is no longer available. Please reach out to Support for further assistance.