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Supported domains in Office 365


Applies to: Office 365 Enterprise

Topic Last Modified: 2013-08-23

Summary: Links to articles that describe how to add a domain to Office 365, and describes valid Internet domain suffixes.

If you already own a domain, you can add it to Office 365 and use it for email, Lync Online accounts, and distribution lists. You can also use your domain to host a public website on SharePoint Online.

To use your domain in Office 365, follow the steps in Set up and manage domains in Office 365 Enterprise and Office 365 Midsize Business. The steps include:

  • Adding your domain to Office 365

  • Using your domain for new and existing accounts

  • Configuring DNS entries for your new domain

  • Using the domain for a public website

  • Troubleshooting your new domain configuration

When you’ve completed all the steps, your domain will be ready to use in Office 365.

You need to add and verify a domain only once. If someone else in your organization has already added and verified the same domain, you can’t add the domain again.

You can add multiple domains to Office 365, but each domain has to have a valid Internet domain suffix, such as .com, .co, .net, .org, or a country code. Here are some examples:

  • Supported: contoso.com

  • Supported: contoso.us

  • Not supported: contoso

  • Not supported: contoso.local

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