You might do a search - there's been some discussion of this in the past. Mostly it was folks wanting to fit the Adv fairing to a standard Enduro, not the other way around.
I recall the general concensus was that it was possible, but not economic or very feasible for going back and forth. I believe the two bikes have completely different front subframes, so you'd basically have to swap entire front ends with all the bits and pieces having to go back and forth (including all the electrics, radiator mounts, fans, etc.).