I can't find anything on the specifics of how federation actually works. The op thread gets copied to any federated server? What happens if the thread is deleted on the op server? Does it still exist on all other federated servers? How do comments and votes work? That kind of thing.
Starting January 9, a new policy on the Xbox Network will automatically remove captures (screenshots and video clips) stored for over 90 days, affecting all users with 'historic' content. This move is believed to alleviate strain on Microsoft's servers.