Will I be able to redeem a game code on steam if I buy the game on MS store?

Often times on humblebundle you can redeem a game bought through their service on steam. If this is the case with AOE:DE I would happily buy the game on the MS store right now. My hesitation is that I will just need to buy a new copy when the steam version comes out. To me it makes some sense that if MS is leasing the game to steam that owning one copy should work on either platform the players prefer.