Cross-sync steps
- Export Airbnb: Calendar > Availability > Sync > Export calendar. Copy the .ics URL.
- Export Booking.com: Extranet > Calendar & rates > Calendar sync > Export calendar. Copy the .ics URL.
- Import Airbnb into Booking: Add a calendar and paste the Airbnb URL.
- Import Booking into Airbnb: Availability > Import calendar, paste the Booking URL.
- Create a test block and check propagation both ways.