We picked up our Refresh MX a couple days ago. No Fobs of course.
My wife's Primary concern with her new MX vs her 2016 MX is that the driver door remain automated in that when she approaches it opens.
I promised her that would be the case.
...well, she keeps her phone in her purse or her back pocket, and it seems that's enough to muffle the signal to the point where the door proximity sensors do not open the door, and if it does it wont swing open.
(Gulp)
So I have a couple fobs from my Plaid MS i figured I would try to program one of them to her new MX and it WORKED!
I stuck the fob in her purse and BOOM! The door opens and swings like her previous MX!
Whew!
TL;DR In a pinch a Refresh MS fob will work with the Refresh MX