This is the step-by-step process of how you can set up your own custom domain in office 365. It can be a little tricky if it\'s the first time you\'re setting it up however once you get the hang of it it\'s something you may only need to do once or just create new users and delete old ones. Either way, it\'s not something you will have to do a lot of but it\'s a simple process and this is how you can do it.