Lists values which specify restrictions for end-users on which appointments can be used in particular events.
The action can't be applied to any appointments.
The action can be applied to recurring appointments only.
The action can be applied to non-recurring appointments only.
The action can be applied to all the appointments.
The action is applied according to the custom method specified by the corresponding AllowAppointment~ or CustomAllowAppointment~ event of the SchedulerControl.
Use this enumeration's members to specify the types of appointments which can be used in end-user restrictions. This enumeration's values are used by some of the AllowAppointment properties of the SchedulerOptionsCustomization and SchedulerControl objects.