Hi, my father has bough a new laptop with Office 365. He has still been using an old xtramail account account and used this to set up the login to his computer plus activated Office 365 with the xtramail address.

He has had nothing but problems trying to sync his email on outlook and his tablet and has finally listened to me and will abandon the xtramail account. I created a new outlook.com email address for him to use but I cannot figure out how to change the email associated with his Office 365. 

Can anyone point me in the right direction?

Cheers.