The Tour Operator can update the suppliers' features from Configurations > Plugin settings.
The following parameters define a time window during which the check-in must occur for the request to be forwarded to the supplier. This window can be specified either as exact dates or as a range of days relative to today.
booking_window_to_days: check-in is allowed up to and including the n-th day, counting today as day 0 (number of days)