Originally Posted by
frankhi
Not the same thing, but I had a reward trip (mco-aua) booked with paid EB. The number of miles needed went down. I was able to rebook at lower mileage and the eb was automatically transferred all online.
Technically, as long as the confirmation number survives, EBCI is supposed to survive as well. Right now, with all the issues from the booking systems conversion, this isn't always true. But that's how it's supposed to work.
Moving from a points booking to a paid one necessitates a new confirmation number.