Folks over reddit has confirmed that Microsoft has finally updated Onedrive to the new UWP version for Xbox One users.
The previous onedrive app was a mess. Neither it had all the features nor it would work properly. It was more like a photo viewer app. Now the new app lets users open doc files alongside other files in their console. However PDF files wont open since there are no pdf file viewer in console. Ask your current pdf reader dev to bring the support soon.
You wont be able to get it by just vising the store. It will appear in ready to install list.
VIA – WC