Set Up Office 365 to Use Your Domain

Once signed up for Office 365, you are issued a Microsoft Office 365 account, and Office 365 creates a domain for you, like contoso.onmicrosoft.com.

Instead of using the domain provided, you may want to add your own public domain before you start using Office 365 for your organization. By doing so you can use a friendly, memorable email address and user ID with the service.

Step 1: Add a Domain in Office 365

Adding your domain is easy. You will need access to:

• The Microsoft Online Portal with a Global Admin account.
• Admin access to your domain.

• See Verify Your Domain to verify TXT or MX record value for domain ownership in Office 365. Also guides to find, create, and verify TXT record value.
• How to Prioritize Multiple MX Records.
• Find Your Domain Registrar or DNS Hosting Provider.

Step 2: Add Users

You have many options to add a user in Office 365. To explore them all, see The Various Ways to Add a User in Office 365.
These are commonly used methods for adding user;

• Add Users One-by-One in The Microsoft Setup Wizard.
• Add Users One-by-One in The Active Users Page.
• Add Users in Bulk in Office 365.
• Add Users Through Active Directory Synchronization Using the Azure Active Directory Connect Tool.

Step 3: Complete Your Setup

• To create DNS records that are needed for Office 365 services at your domain registrar or DNS host, you need to use specific values for the records. See Locate Your Unique DNS Values in Office 365 for more information.
• See Update Your DNS Records guide to update your DNS records for Office 365.

Related Articles:

• DNS Records Explained.
• Domain Management - Frequently Asked Questions.