appointment

If you fail an exam, you may schedule another attempt.  Do not reschedule the same appoinment; create a new appointment for the additional attempt. 

Your subscription does have a limited number of attempts, so you may only schedule another appointment if there are attempts remaining on your subscription.  Additionally, you may only attempt a given exam 3 times.  If you have not passed the exam after 3 attempts, you will not be permitted to schedule it again, until a new version is published.

Yes, it counts as an attempt.  If you do not keep your appointment and you do not cancel or re-schedule it prior to the start date and time, then your appointment will be regarded as an attempt. The proctor will update the status of the appointment to "No Show" and this will be reflected in the Certification Hub under Exam Appointments | Previous Appointments. 

Yes, you can re-schedule an exam appointment prior to its start date and time. There is no penalty for re-scheduling and a re-scheduled appointment does not count as an attempt. You can do this from the Exam Appointments | Upcoming Appointments section in the Certification Hub.  Use the calendar icon to re-schedule an appointment.  Do not re-schedule an appointment associated with an incomplete attempt. 

Yes, it is possible to cancel an exam appointment prior to starting the appointment.  You can do this from the Exam Appointments | Upcoming Appointments section in the Certification Hub.  Use the trash can icon to cancel an appointment.  The appointment will then appear in the Previous Appointments section of this page with a status of "Deleted."  You will not lose an attempt for a cancellation.

You should plan to start your exam at the time of your scheduled appointment.  The "start exam" link will be displayed to you as early as 15 minutes prior to your appointment, but the proctor may not be available until the appointment start time.  The link is displayed prior to the appointment so you can ensure the proper functioning of your computer prior to taking the exam.