I'm not familiar with what type of code this is, but if it's 25 characters long then you should be able to redeem it on your Xbox One console. If it's any less than 25 characters than this would be something you'd have to redeem in game.
I don't own FIFA 14 for the Xbox One so I'm not sure where the menu would be exactly in-game. You may want to ask
EA Support for that information.
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