I Watched the full Nightfall Series on the Halo Channel, but i dont get the Armor.
Give it a Day or two. There’s some delay after the game ackowledge it. It happened to me too. 
I’m already waiting 2 Mounths.
Do you already have the armor because I think it can be unlocked by gold packs
No i dont have the Armor
In my case the problem was the language of my Xbox One, which was in “Spanish”. When I changed the Language on my Xbox One to “English” and the Language Region to “United State” I only had to see one chapter and they gave me all the rewards.
Note: I did not have to change the Location
> 2533274913487909;6:
> In my case the problem was the language of my Xbox One, which was in “Spanish”. When I changed the Language on my Xbox One to “English” and the Language Region to “United State” I only had to see one chapter and they gave me all the rewards.
>
> Note: I did not have to change the Location
most helpful answer so far
I have waited a year and did not get the nightfall set