Once you link a Booking.com listing with Guesty, all reservations with a future check-out date (including all reservations with a future check-in date) will be imported into Guesty. The only guest details that Guesty receives for these reservations are the names on the reservations.
Note that email addresses, phone numbers, and credit card details are not received in Guesty for imported reservations.
Guest details and credit card information must be added manually in Guesty.