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How to Add Domain to Office 365 - Step by Step

Domain names plays vital role in establishing trust and personalized brand to your organization. Its typically used in your website addresses and Email Ids. When you first signup for Office 365, The default domain name "Your-domain.onmicrosoft.com" will be assigned. Until you add your own domain to Office 365, any new users that you create contain the default domain name. E.g. your Email Ids looks like Salaudeen@SharePointDiary.onmicrosoft.com. You can change it to a personalized address like Salaudeen@SharePointDiary.com. Here is my step-by-step configuration guide to add a custom domain to Office 365.

Prerequisites: I'm assuming you have an existing domain registered with GoDaddy.com and you have credentials to login to the DNS control panel of GoDaddy. In my case, I've an existing domain purchased from GoDaddy "TheCrescentTech.com".

Adding domain to Office 365 is a two step process. First you need to verify the domain with Microsoft, that you are the owner of the domain. Next you need to set up the DNS records for Office 365 services. Its a best practice to add your custom domain before you create user accounts or synchronize your on-premises Active Directory!

Add Custom Domain to Office 365
  • Login to Office 365 Admin Portal https://admin.microsoft.com/AdminPortal/. From the left navigation menu, Expand Setup >> Click on "Domains". You will see a list of domains associated with your account. To add a new Domain, Click on "Add domain" button on the top.add custom domain office 365
  • Enter the name of your domain you want to add, then click Next. In my case its "TheCrescentTech.com".add domain in office 365
  • Choose how you want to verify that you own the domain. My domain is registered with GoDaddy, So Office 365 gives me an option to Sign-in and set up records for verification automatically. You can use a TXT record to manually verify your domain. Select "Sign in to GoDaddy (recommended) option and click Next. office 365 add domain step by step
  • This pops up the login page for GoDaddy's DNS control panel. This step requires you to log in to your domain’s DNS host portal.  Login and Click on "Authorize" from GoDaddy.office 365 add domain godaddy
  • Choose how you want to make the DNS changes required for Office to use your domain. In my case, I chose "Add the DNS records for me (recommended)" so that Office 365 configures the necessary DNS entries automatically.office 365 adding a domain
  • Click Next - you're done verifying the domain! After your domain has been successfully verified by Office 365, Office 365 prompts you to set up your online services such as MX records, SRV records, etc. You can select relevant services or select "Set up my online services for me. (Recommended)" option. office 365 add domain dns records
  • You may get a prompt again from GoDaddy. Authorize to continue making changes. The next pages gives you the summary of all required DNS changes the wizard about to make, like MX records for Outlook Email, CNAME records for multi-purpose, TXT records for configuration and setting purposes, and Service Protocols for Skype Business services. office 365 how to add domain
  • If successful then you should see message Congratulation! Your domain and email addresses are all setup.  office 365 add domain name
  • That's all! You have Office 365 setup ready with a custom domain. You should able to create users and assign appropriate licenses. You should see the domain in your Domains list. office 365 add a domain wizard
Now you can add user accounts to the added domain and assign the domain to existing users as well.
How to Add Domain to Office 365 - Step by Step How to Add Domain to Office 365 - Step by Step Reviewed by Salaudeen Rajack on December 15, 2017 Rating: 5

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