Dear - Unaiz Shehzad,

Many thanks for the response. Yes, since you bought the domain name and the domain email through GoDaddy, you can purchase the Microsoft plan through GoDaddy's website. If you purchase the Microsoft plan through GoDaddy, you can still use your domain email with Outlook. You will need to configure your domain email account in Outlook using the correct server settings provided by GoDaddy. If you need assistance with this, you can contact GoDaddy's customer support team or refer to their documentation for instructions.

If our information was helpful, we also invite you to vote the reply so that others may find it easier.

Please feel free to let me know if there are any updates or if I've got you wrong. If still have any concern, please let me know so I can provide further suggestion.

Sincerely,

De Paul | Microsoft Community Moderator

Dear Dobrosława Duszyńska

Good day!

Thank you for posting to Microsoft Community. We are glad to assist!

Based on your description, I understand you concern with to use your custom domain with Microsoft Teams and Outlook.

You may have a try to do following steps:

1. Add your domain to Microsoft 365: Go to the Microsoft 365 admin center, navigate to Settings > Domains, and select Add domain. Follow the steps to verify that you own your domain and set up the necessary DNS records, you can refer to Add a domain to Microsoft 365 - Microsoft 365 admin | Microsoft Learn.
2. Set Up Email Aliases: Once your domain is added, you can create email aliases for your custom domain. Go to Users > Active users. Select the user (yourself) and click on Manage email aliases. Add your custom email address (e.g., [email protected]) as an alias.
3. Set Primary Email Address: After adding the alias, you can set it as your primary email address. In the Manage email aliases section, select your custom email address and set it as the primary email.
4. Configure your email account in Outlook: Ensure that your custom domain email is set up as an Exchange account in Outlook. This will allow you to send and receive emails using your custom domain email address

For @onmicrosoft.com, when you sign up for Microsoft 365, Microsoft provides an onmicrosoft.com domain - your fallback domain - in case you don't own a domain, or don't want to connect it to Microsoft 365 (for example, tailspintoys.onmicrosoft.com). Your fallback domain is used by default in:

• Usernames and email addresses
• Microsoft 365 teams & groups email aliases
• Automatic domain dependency moves

You can refer to Add and replace your onmicrosoft.com fallback domain in Microsoft 365 - Microsoft 365 admin | Microsoft Learn 

If you have other questions, please feel free to let me know, I will continue to assist you.

Thanks for your precious time and your understanding would be highly appreciated. Have a nice day!

Best regards,

Allen | Community Moderator

Dear Bunpot Assawarungsee

Thanks for your quick reply!

If you start subscribing to Microsoft 365 Business (Standard), you can surely use customized domain. However, you can't use the same email address for a commercial Microsoft 365 email account and a consumer Microsoft 365 or Outlook.com account. So, your current outlook.com account and your business account would be kind of separated. You may try to set up a forwarding/redirecting rule for your outlook.com account so that the mails sent to it would be visible to your business account.

Generally, when you sign up Microsoft 365 business service, it creates a domain for you, like contoso.onmicrosoft.com. The user ID that you create when you sign up includes the domain, like ******@contoso.onmicrosoft.com.

If you want to have your email look like ******@contoso.com, you can buy a domain or just follow the steps in Add your users and domain to Microsoft 365 if you own it already. And you can keep using the initial onmicrosoft.com domain even after you add your domain. It still works for email and other services, so it's your choice.

You can also replace your onmicrosoft.com domain after sign-up. While you can’t rename or remove an existing onmicrosoft.com domain, you can create a new one and make it your default onmicrosoft.com domain (your "fallback domain"). For example, if the initial domain you chose was fourthcoffee.onmicrosoft.com, if needed you can create a new onmicrosoft.com domain called fourthcoffeecorp.onmicrosoft.com and set it to be your fallback domain.

For more information, please kindly refer to Add a domain to Microsoft 365 - Microsoft 365 admin | Microsoft Learn and Domains Frequently Asked Questions | Microsoft Learn.

Your patience and cooperation will be greatly appreciated. I hope all the best!