In Focus

Register Public Domain With Office 365

In this article, we will explore how we can register a public domain with Office 365, instead of using the default provided domain.

Overview

 
Office 365 consists of various Software-as-a-Service including Office suite, SharePoint, Dynamics 365, Teams, Flow, OneNote, OneDrive, Planner, etc. Office 365 Education is free for schools and students with a valid school email address. Office 365 is being widely used for collaboration across various organizations.
 
In this article, we will explore how we can register a public domain with Office 365, instead of using the default domain.
 

Need for Public Domain

 
When signed up for Office 365, it provides the default domain in the format of xxx.onmicrosoft.com (where xxx is your tenant name chosen while setting up Office 365). The default domain works fine with no issues. However, if you are planning to setup Office 365 for a large organization, the necessity arises to have a custom domain representing the organization. There are a variety of domain providers available from which you can get the public domain. The public domain then can be registered with Office 365 in order to refer to Office 365 by public domain url. While adding the public domain to Office 365, we have a couple of options to go with.
  1. Buy a new domain and register with Office 365
  2. Use an existing domain to register with Office 365

Buy a new domain

 
If you do not have any pre-existing domain with you, buying a new domain from Office 365 might be a good option.
  • Open Microsoft 365 Admin Center.
  • Under Setup, click Domains.
Register Public Domain With Office 365 
  • Click “Buy domain”.
  • Find your new domain name by checking the availability. Click "Next".
Register Public Domain With Office 365 
  • Add domain contact information. Click Next.
Register Public Domain With Office 365 
  • Confirm your details and make a payment.
Register Public Domain With Office 365 
  • After successful payment, click Accept on the dialog box to let Office 365 make domain entries to the GoDaddy domain center.

Use an existing domain

 
If you already have a public domain, it can be configured in Office 365 to use.
  • Open Microsoft 365 Admin Center.
  • Under Setup, click Domains.
  • Click “Add domain”.
  • In the dialog box, enter the domain name you own. Click Next.
Register Public Domain With Office 365
 
  • There are two options to verify the domain. It's recommended to use a verification email. Click “Send code via email”.
Register Public Domain With Office 365
  • Another option is to use “Add a TXT record”.
Register Public Domain With Office 365
  • Copy the values to your domain provider (In my case, I am using BigRock - domain provider) 
Register Public Domain With Office 365 
  • Once the TXT record is added, navigate back to Microsoft 365 Admin Center. Click Verify. The domain will be verified. Click Next.
Register Public Domain With Office 365 
  • Setup your online services by selecting the recommended option of Set up my online services for me. Click Next.
Register Public Domain With Office 365
  • Choose the online services. Click Next.
 Register Public Domain With Office 365
  • Click Import DNS records. Office 365 will query your site's existing DNS records and automatically import them. Click Next. 
Register Public Domain With Office 365 
  • Activate services for your domain, like email and instant messaging, by adding DNS records for your domain at your registrar or DNS hosting provider. Click Verify.
Register Public Domain With Office 365 
  • The domain should appear under the Office 365 portal. 
Register Public Domain With Office 365 

Set Default Office 365 Domain

 
Now that we have default and custom domain available in our Office 365 tenant. We will set our custom domain as the default one.
  1. Click our custom domain (e.g. sharepointrocks.com)
  2. Click “Set as default” to set the custom domain as default.
 Register Public Domain With Office 365

Edit Active Users

 
Now, we will have to update the emails of active users to use our custom domain.
  • Open Microsoft 365 Admin Center.
  • Under Users, click Active Users.
  • Select any user.
  • Edit User name / email aliases.
Register Public Domain With Office 365 
  • Enter new domain alias and set as primary.
Register Public Domain With Office 365
  • Click Save.
  • Sign out of the Office 365 portal and sign in with your new email address.
Register Public Domain With Office 365
 

Summary

 
Office 365, when setup, provides the default domain (xxx.onmicrosoft.com). The public domain then can be registered with Office 365 in order to refer Office 365 by public domain url. We may buy a new domain or use an existing domain.