Microsoft 365 Help

How do I set up Microsoft 365 mail on my domain name?

This article will show you how to set up email for Microsoft 365 on your 123 Reg domain name.

To set up Microsoft 365 mail on your domain name, you’ll need to ensure your domain is pointed to the 123 Reg nameservers. Otherwise, you will be unable to manage them from the 123 Reg Control Panel.

If you don’t already have Microsoft 365, you can compare plans here.

Please note: if you wish to share your contacts and files, both domains will need to have Microsoft 365 accounts.
  1. Start by logging in to your 123 Reg Control Panel.
  2. From there, open the Email & Office section and click Set up opposite the account that you’d like to use. Alternatively, click ‘Manage All’ to view all Email and Office products.
  3. You will now need to choose which domain name you want to use as the basis for your email address. If there's already an email account for this domain, you'll receive an Existing Email notice. Once you’ve chosen a domain name, select Continue.
  4. Enter all the details for your new email address into the provided fields, such as your name, mailbox password and renewal/expiration date, and select Create.
  5. You will now need to activate your account to complete the switch to Microsoft 365.


    Check for an email inviting you to activate your Microsoft 365 account and click the Get Started button within this message.

  6. You will now be taken to your Email & Office Dashboard. From here, click Let's fix this within the banner that says your new email isn't ready.
  7. On the ‘Ready to Switch’ page, choose Yes, Switch Now to start using Microsoft 365 mail.

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