The IsRecurring property indicates whether this appointment is specified as recurring. Read-only.
objAppointment.IsRecurring
Boolean
The IsRecurring property contains True if the appointment is recurring and False if it is not. IsRecurring defaults to False in a newly created AppointmentItem object.
IsRecurring is set to True when the GetRecurrencePattern method is called and to False when the ClearRecurrencePattern method is called.