Change your email address to use your custom domain

Contributors: Peter Baumgartner

Check the Domains FAQ if you don't find what you're looking for.

Your initial email address in Office 365 includes, like You can change it to a friendlier address like You'll need your own domain name, like first. If you already have one, great! If not, you can learn how to buy one from a domain registrar.

When you change your domain's email to come to Office 365, by updating your domain's MX record during setup, ALL email sent to that domain will start coming to Office 365. Make sure you've added users and created mailboxes in Office 365 for everyone who has email on your domain BEFORE you change the MX record. Don't want to move email for everyone on your domain to Office 365? You can take steps to pilot Office 365 with just a few email addresses instead.

Change your email address to use your custom domain using the Office 365 admin center

  1. Sign in to Office 365 with your work or school account.

  2. Choose Setup > Domains.

  3. On the Domains page, choose Add domain.

    On the Domains page, choose Add domain

  4. Follow the steps to confirm that you own your domain and to change your email address.

You’ll be guided to get everything set up correctly with your domain in Office 365.

The short icon for LinkedIn Learning. New to Office 365?
Discover free video courses for Office 365 admins and IT pros, brought to you by LinkedIn Learning.

See Also

Buy a custom domain using Office 365

Expand your Office skills
Explore training
Get new features first
Join Office Insiders

Was this information helpful?

Thank you for your feedback!

Thank you for your feedback! It sounds like it might be helpful to connect you to one of our Office support agents.