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Office Support / Office 365 Admin / Domains

Change your email address to use your custom domain

Your initial email address in Office 365 includes .onmicrosoft.com, like tom@fourthcoffee.onmicrosoft.com. You can change it to a friendlier address like tom@fourthcoffee.com. You'll need your own domain name, like fourthcoffee.com 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.

Important: We’re rolling out changes to the Office 365 admin center every month to a selection of users. Check out Which version of the admin center do you see? to see what version of the admin center you have.

Which version of the admin center do you see?

If you see this, follow the steps under Change your email address to use your custom domain using the classic admin center.

Illustration of the Office 365 Admin Center. Find out more about the Office 365 admin center

If you see this, follow the steps under Change your email address to use your custom domain using the admin center preview.

Illustration of the Office 365 Preview Admin Center. Find out more about the Office 365 Preview admin center

Tip: We're still working on the admin center preview. You can switch back to the classic admin center if a setting or task you need is not yet available in the preview.

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

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

  2. Go to the Domains page.

  3. On the Manage domains page, choose Add domain.

    On the Manage domains page, click 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.

Want to see the steps first? Check out the video:

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

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

  2. Go to the Domains page.

  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.



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