Board Thread:Questions and Answers/@comment-28883666-20160827184326/@comment-25120690-20160827210020

I believe if you add friends to your XBox Live account you can have your 'friends' join your worlds, (Turn on "Broadcast To XBox Live). But I don't believe you can turn a world into a realm, if that's what you mean.

(Hope this helps)

-Pigman