It would be helpful to have a reschedule link that can be included in appointment confirmations or reminder messages which expires a configurable amount of time before the scheduled appointment.

For example, I may want clients to be able to reschedule online (including paying any applicable rescheduling fee), but only up until 24 hours, 12 hours, or 1 hour before their appointment. After that cutoff, the reschedule link should no longer work.

Currently, expiration can be set relative to when the link is generated or sent, but not relative to the appointment time. Adding an appointment-based expiration option would give businesses much better control over their rescheduling policies.