If a student is not able to attend an exam session, you can Withdraw them, and the exam credit will be returned to the program's account so it can be rescheduled.
This function is available in the Exam Scheduling tab. Click Edit next to the exam event in which the student is scheduled.
Then, scroll down to where you assign the students and select Manage.
Finally, select Withdraw in the right column.
The exam credit will be returned to your account and you can reschedule the student for the exam. It may take up to five minutes to complete.
This functionality is also available in the Students tab. Click Exams next to the student's name and then select Withdraw next to the desired exam event.
This process will also work if the exam session has started but the individual student was not selected as Present and authorized to begin.