Why are some booking.com rate plans not showing in Hostex?

When you authorize your booking.com account with Hostex, all rate plans for a listing are loaded into Hostex, and you must link all these rate plans to the relevant property or room type on Hostex.

However, it is important to note that if you create new rate plans in Booking.com dependent on a main rate plan after authorizing Hostex, these new rate plans will display with a “Not XML” tag in the calendar, and Booking.com will not allow you to sync them in Hostex. You can only manage them in Booking.com.

So, if you need to create new rate plans and want to manage them in Hostex, you will need to create a new, independent rate plan in Booking.com.