Within Courseware, you are not able to manually add students. Students will be added to your Courseware roster when they click on the link within your Campus LMS. This will automatically enroll them into Courseware.
If a student drops your course, they are not automatically removed from Courseware, but you are able to deactivate them from your roster. To do this, log into your course and click on the Learning Path in your navigation menu on the left. You will then click on Connect and then Roster.