How can I switch users on XB1?

Hi guys, I haven’t figured out how I can switch users on XB1 or even log out.
I’m logged in using my plex account but I want to login using one of my server/internal accounts or at least be able to switch users.

Also, I feel the XB1 client is missing a lot of features, like browse the library by folders like it’s available for iOS, Windows, etc. I’ve all my movies in separated folders by genre and on XB1 they are just displayed on the screen and I’ve no way to find by genre or other sorting, but by going through first letter of the movie name.
Looking for a movie to watch by initial letter is not fun.

I do love your work guys, that’s why I got the Plex life subscription, to make sure you aren’t going away so soon… Please, give us more on XB1…

I’ll move this to the Xbox One section.

This thread has an explanation of multiuser on Xbox One. In short, it’s currently a 1 to 1 relationship between the Plex.tv account and the Xbox Live account. Fast user switching (and by extension, managed users) is currently not support.

The Xbox One app is still is development, so it is known that it is missing features. The devs are still working on these pieces (which is why it’s still in preview). Check out the stickies in the Xbox One section for more information.