You may also delete an existing enrollment in a batch.
1. Go to Cast Editor or Courses.
2. Select your preferred course.
3. In the Course Profile, click on any batch under Batches.
4. In the enrollee list, tick the checkbox/es of the users you want to unenroll or remove from the batch.
5. Click on the vertical ellipsis button and then select Remove.
6. A pop up will appear confirming this action. Click on OK to proceed.
Warning: Deleting a user's enrollment will also delete their progress and records. The deleted user in the batch will not be able to see the course in his/her portal anymore. Delete enrollments with caution.
Another way of unenrolling the user is by deactivating the user. To learn more about this, go to this article in deactivating the user.