Mods, we may want to sticky this.
Apparently if you change the Hotmail account associated with your phone to the new Outlook.com address, can cause issues that could cause you to have to do a full reset of your phone.
Windows Phone users: do not rename your email to Outlook.com | ZDNet
Apparently if you change the Hotmail account associated with your phone to the new Outlook.com address, can cause issues that could cause you to have to do a full reset of your phone.
Windows Phone users: do not rename your email to Outlook.com | ZDNet