"Microsoft pulled its support page that instructed users how to update their Xbox One systems offline using a USB drive. We've included an image of the cached support page above, which is no longer available to view.
The Xbox Support page instructed Xbox One owners with a two gigabyte USB stick to download one of two compressed update files to their computers, then unzip them to the root of the USB drive. The process then had owners holding the bind and eject buttons while turning their consoles on, releasing the two buttons once they hear two start-up tones. According to the now-unavailable support page, that last step told the Xbox One to search for an update from a USB drive, a procedure that isn't part of the system's initial booting process.
We've contacted Microsoft for comment."