I have set up API integration option for Airbnb and Vrbo and there is a section for Email Send Booking Confirmation. The default is not checked, however, what happens if checked?
I worry that Airbnb and Vrbo already send out booking confirmation through the channel directly and if the Email Send Booking Confirmation is checked, another email of booking confirmation is sent out of OwnerRez resulting in 2 booking confirmation to the guest. Is this what's going to happen?
Yes, if you checked those boxes, that is exactly what would happen, which is why we don't recommend doing that.
Also, those default messages will include financial data for the booking, which will always be wrong, because it won't reflect the guest fees that the guests pay the channels directly.