ReminderPlaySound Property
True if the reminder should play a sound when it occurs for this appointment or task. The ReminderPlaySound property must be set in order to validate the ReminderSoundFile property. Read/write Boolean.
Note This property is only valid if the ReminderOverrideDefault property is set to True.
expression.ReminderPlaySound
expression Required. An expression that returns an AppointmentItem, MailItem, or TaskItem object.