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

Once you have verified your domain name with Microsoft 365 (previously known as Office 365), you can configure the DNS for your domain name in your 123 Reg Control Panel. You can find the DNS entries required by following the steps listed here.

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.

Please note: this article was originally created for our legacy Control Panel. As such, the steps outlined below may not be relevant for domain names purchased after August 2023.

In addition to this, it will take between 24-48 hours for any new nameserver (DNS) records to become active. For more information on changing your DNS records, please view the following article: How do I change the nameservers for my domain name?

Step 1 of 9

Start by logging in to your legacy Control Panel. For details on how to do this, please read the following article: How do I access and manage my products?

Step 2 of 9

From there, select Domain Names within the ‘Manage active products’ section.

Next, choose your domain name from the provided list and then select Manage.

Manage Domain Names


Step 3 of 9

Scroll down to the Advanced Domain Settings section and select Manage DNS.

Click Manage DNS


Step 4 of 9

Select Change within the Email Settings (MX Records) section.

Select Change


Step 5 of 9

Choose an external email service from the drop-down list.

Choose Email service


Step 6 of 9

In the Location of service: field that appears, enter your Microsoft 365 MX record that you have been provided with (i.e and select Point to service.

Enter Location Information


Step 7 of 9

A pop-up window will appear, asking if you wish to confirm your changes. Click Confirm to complete the process.

Confirm Changes


Step 8 of 9

Select the Advanced DNS tab.

Select Advanced DNS


Step 9 of 9

Add the remaining DNS records to configure Microsoft 365 on your domain name one at a time, pressing the Add new entry button between each record.

Add DNS records

Once completed, your DNS records section will look like this:

Complete DNS records

Please note: if you require an SRV, CNAME and SPF record to be added to your domain name, please read the following articles: