Update required!
Can not change room status to sold out. That functionality is one aspect lacking which forces the user away from the app towards the more complicated but more useful browser monster. Would be nice to adjust inventory to sales with a few easy clicks, but it seems booking.com thinks no other ways of selling a room exist. They do... The app is useless to help in that area.
Electric Frogs about
Pulse for Booking.com Partners, v1.5