How to add a domain to Microsoft 365 for email (Exchange Online)

Adding a domain to Microsoft 365 for email (Exchange Online) involves a series of steps, which may vary slightly depending on the specifics of your setup. Here’s a general guide to get you started:

Step 1: Prepare Your Microsoft 365 Account

1. Login to Microsoft 365 Admin Center Navigate to the Microsoft 365 Admin Center (admin.microsoft.com) and log in with your admin account.
2. Access the Setup Section Once logged in, go to the “Setup” section and then select “Domains”.

Step 2: Add a New Domain

3. Add Domain Click on “Add domain” to initiate the process of adding a new domain.
4. Enter Domain Details Enter the name of the domain you want to add and follow the on-screen instructions to verify ownership.

Step 3: DNS Records Setup

5. Update DNS Records Microsoft will provide you with a list of DNS records (like MX, CNAME, and TXT records) that need to be added to your domain’s DNS settings. You’ll do this at your domain registrar’s website.
6. Verify DNS Records After updating the DNS records at your domain registrar, return to the Microsoft 365 Admin Center to verify the changes.

Step 4: Configure Exchange Online

7. Exchange Admin Center Navigate to the Exchange Admin Center (usually found under “Admin centers” > “Exchange”).
8. Email Addresses Under “mail flow” > “accepted domains”, add your domain and set it as the primary domain.
9. Create Mailboxes Go to “recipients” to create mailboxes for users with the new domain. You can either add new mailboxes or update existing ones with the new domain.

Step 5: Test the Setup

10. Test Email Flow Test the email flow by sending and receiving emails to and from addresses associated with the new domain.
11. Test Other Services Ensure other services (like Microsoft Teams, SharePoint, etc.) are functioning correctly with the new domain.

Step 6: Complete the Setup

12. Complete Domain Setup Go back to the domain setup page in the Microsoft 365 Admin Center and complete the setup.
13. Post-Setup Configuration Configure additional settings as per your organization’s requirements, including setting up SharePoint sites, configuring Teams, and more.

Step 7: Support and Maintenance

14. Monitoring and Maintenance Continually monitor the setup and make necessary adjustments based on the needs and feedback from users.
15. Support Provide support to users and address any issues that may arise during the usage of the new domain with Microsoft 365 services.

Note

• Always ensure to have backup solutions in place to prevent data loss.
• Depending on your subscription, some features and options might vary.

Conclusion

This guide outlines the steps you need to take to add a domain to Microsoft 365 for email and exchange. Remember, always consult the official Microsoft documentation or support if you encounter issues or need further assistance.