Another Xbox account (PC)

Hey guys.

Kinda need your help.

I play Forza horizon 4 and 3

I bought fh3 and 4 on the same Microsoft account.

I have 2 accounts, one with the same email as i purchase the games

And one with a different email( used to use the other account to play fh3 but when fh4 came out i switched to the other xbox account.)

I want to buy an add on in fh4 with the other Xbox account (not the one with the same email as the one that i purchased the game with)

Is it possible to get the add on? On the account that didn't purchased the game? Or it will be tied to the other account (the one with the same email as i purchased the game with).

Thanks!

:)