Hello, I bought a new computer, I use outlook with a subscription to office 365. In outlook I had 2 email addresses 1) xxxx@9online and 2) firstname.lastname@example.org . Now I want to use email@example.com but when installing, it's xxxx@9online that taken by office 365 and impossible to add firstname.lastname@example.org. How do I replace email@example.com with firstname.lastname@example.org when installing or just after? Thank you so much for your help.