Guide to connect and map booking.com to Channex
Request connection to Channex.io in booking extranet
Login to the admin for the property here: https://account.booking.com/e
Copy the property code at the top of the navigation, you will need this later inside Channex to connect the account
Click on Account > Connectivity Provider
Choose Provider Screen
Click on "Search"
Type "Channex" and it will find Channex.io on the list.
You have to type the whole word "Channex" since it wont find it otherwise.
Once Channex is selected on the list it will show the summary box, just click "Next"