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Change your Microsoft 365 email address to use your custom ___domain

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Check out Microsoft 365 small business help on YouTube.

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

Your initial email address in Microsoft 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.

Your initial email address in Microsoft 365 operated by 21Vianet includes partner.onmschina.cn, like tom@fourthcoffee.partner.onmschina.cn. You can change it to a friendlier address like tom@fourthcoffee.cn. You'll need your own ___domain name, like fourthcoffee.cn 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 Microsoft 365, by updating your ___domain's MX record during setup, ALL email sent to that ___domain will start coming to Microsoft 365. Make sure you've added users and created mailboxes in Microsoft 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 Microsoft 365? You can take steps to pilot Microsoft 365 with just a few email addresses instead.

Set up business email with a new ___domain

Check out this video and others on our YouTube channel.

Buy a new ___domain name for your email address and set up the email addresses with Microsoft 365.

  1. Buy a new ___domain name for your email address by providing your contact information for the new ___domain name, choosing your payment method, and then placing your order.
  2. Change the first part of the address (before the @ sign) or leave it as is.
  3. Sign out of Microsoft 365, and then sign back in with your new email address. Your employee email addresses are updated with the new ___domain.

Set up business email with an existing ___domain

Use a ___domain name you already own whether you're using it for a website address or an email address at another provider.

  1. Sign into the website that hosts your ___domain. Click a button to verify automatically or update the ___domain manually.
  2. Customize the email address or leave it as is.
  3. Sign out of Microsoft 365, and then sign back in with your new email address. Your employee email addresses are updated with the new ___domain.

Change your email address to use your custom ___domain using the Microsoft 365 admin center

You must be a global admin to perform these steps.

  1. Go to the Microsoft 365 admin center.
  1. Go to the admin center at https://portal.partner.microsoftonline.cn.

  1. Go to the Settings > Domains page.

  2. On the Domains page, select Add ___domain.

  3. Follow the steps to confirm that you own your ___domain. You'll be guided to get everything set up correctly with your ___domain in Microsoft 365.

  4. Go to Users > Active users.

  5. Select a user to edit their username and change it to the ___domain you just added.

Note

If you are not using an Exchange license, you cannot use the ___domain to send or receive emails from the Microsoft 365 tenant.

Related content

Buy a custom ___domain using Microsoft 365 (article)
Manage domains (link page)
Domains FAQ (article)