Backwards Compatibility Question

So I am considering playing Halo: Reach on Xbox One via backwards compatibility. One question though: will my multiplayer progress (rank, armory unlocks, etc.) be transferred over to the Xbox One?

Why yes. As it would be a pain to get back to Eclipse rank and everything unlocked. The only things that don’t save is your maps, gametypes, and pictures, unless you transfer them to the cloud, which I didn’t but it didn’t matter.

Yeah, everything will be there. In case you have any pre-order items, you can download them through “Manage Game” on your Xbox One.