When an appointment is scheduled in the calendar specified in the "Calendar to Check" in the calendar linkage, it will be reflected in the candidate dates and times on the booking page in real time.
The booking page will block the proposed date, so that the guest cannot select that time, thus preventing double booking.
When an appointment is made on the booking page, the appointment is linked to the calendar specified in the "Calendar to which appointments are added.
The linked calendar can also reflect Jicoo appointments, thus preventing double bookings in the same way.