I have been trying to figure this out for days... Finally after threatening microsoft lol and raging about it always telling me enter phone number for verification purposes, i found a nice little bypass where it does not prompt you for a phone number.. I can not make accounts on my xbox one, every time i try to make a new account it just brings up the sign in bar on the left hand side. All you have to do is open the xbox app on your PC, and create a account right on there. when it asks you for security information such as a phone number, a prompt at the bottom will come up that says use email instead. This is the ONLY WAY to use email instead if you can not make a account on the website or xbox itself. Cheers if this helped!