There are certain conditions that the license can be revoked and cannot be revoked.
To being with, the grace period available to revoke/re-assign any User license is 15 days from using that license. The following are the conditions in which this is allowed or not:
- [Not Allowed] If the license is already assigned to a student, and that student is already assigned to an exam even that exam has not been taken yet, the license cannot be revoked.
- [Allowed] If the license is already assigned to a student, and that student is not yet assigned to any exams, you can delete this student and his license will be available to re-assign as long as the grace period is available.