How do you add and register a domain to Microsoft 365?

Sure, here are the steps to add and register a domain to Microsoft 365:

1. Sign in to the Microsoft 365 admin center with your admin account.

2. In the admin center, go to the Settings > Domains page.

3. On the Domains page, select Add domain.

4. Enter the name of the domain you want to add, then follow the instructions provided.

5. Microsoft will provide you with one or more DNS records to add at your domain registrar. This is to verify that you own the domain.

6. Once you've added the DNS records at your domain registrar, go back to the Microsoft 365 admin center and select Verify.

7. After your domain has been verified, you can choose to set it as your default domain. All new users that you create will now have email addresses that use this domain.

8. The final step is to add your users and set up your email. You can either add users individually, or you can use the bulk add option to add multiple users at once.

Remember, it may take up to 72 hours for the domain to be fully propagated and functional.