I recently got a new email for work, which I’m now using as the ‘primary alias’ in my Microsoft account. I removed the old email from my account, but now I’m second-guessing that decision as I’m not sure how the unlock codes I’ve redeemed for Halo Infinite will identify my MS account when the game comes out. Does anyone know if the codes are still there, or if they’re linked to my old email address? It’s the same account, just with a new linked alias.
I don’t mean to bump my own thread, but I really hope I can get a definitive answer on this. My Microsoft account isn’t letting me re-add my old email address, so I’m crossing my fingers that the alias doesn’t matter. 
The items should be tied to your Microsoft account and not a particular email address. If you’ve swapped out emails your underlying account should be the same - so any previous purchases you’ve made will still show up in your account history.
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> The items should be tied to your Microsoft account and not a particular email address. If you’ve swapped out emails your underlying account should be the same - so any previous purchases you’ve made will still show up in your account history.
Thanks for letting me know. It was hard to tell, because the codes were redeemed on Waypoint rather than the traditional Microsoft ‘redeem a code’ page. I appreciate the help!