Verify a domain at 1&1 Internet


If you already have a domain registered with 1&1 Internet, and you want to configure it to work with Microsoft Office 365 for enterprises, domain verification is required to confirm that you own the domain. To verify your domain, you create a DNS record at 1&1 Internet, and then Office 365 uses that record to confirm that you own the domain.


  • If you registered your domain with 1&1 Internet but moved your DNS hosting to another provider, you’ll need to create the DNS verification record where your DNS is now hosted.

  • Before you can verify your domain, you must add the domain to Office 365. When you’ve added a domain but the domain hasn’t yet been verified yet, the status is Click to verify domain. For more information about adding a domain, see Add your domain to Office 365.

  • You can add and verify a domain name only once. If someone else in your company has already added and verified a domain name, you will receive an error message if you try to add the same domain again.

The following instructions describe how to verify a domain when the DNS for that domain is managed at the 1& 1 Internet domain registrar. You must complete all of these steps to verify your domain in Office 365. For general instructions about verifying a domain, see Verify a domain at any domain name registrar.

Complete these steps

  1. Gather your domain information

  2. Create an MX record at 1&1 Internet

  3. Verify your domain with Office 365

Step 1. Gather your domain information

You’ll need some information about your domain so that you can create the DNS record that will be used for verification.

  1. In Office 365, in the header, click Admin.

  2. Under Management, click Domains. Follow the instructions to add a domain to Office 365.


    If you have already added a domain to Office 365, on the Domains page, in the list of domain names, find the domain that you are verifying. In the Status column, click Click to verify domain.

  3. On the Verify domain page, in the See instructions for performing this step with: drop-down list, choose 1&1 Internet. If 1&1 Internet doesn’t appear in the list, choose General instructions.


    If 1&1 Internet doesn’t appear in the list, follow the instructions in this topic. Don’t follow the general steps that appear on the page when you click General instructions.

  4. From the table, copy or record the Destination or Points to Address information.

You’ll need this information when you create the new DNS record at 1&1 Internet in the next section.

Step 2. Create an MX record at 1&1 Internet

Office 365 uses an MX record that you create at 1&1 Internet to confirm that you own the domain. This MX record isn’t part of your Exchange Online email flow. It’s just to let Office 365 make sure that you own the domain. Use the instructions below to create the record at 1&1 Internet.


You may notice differences between the 1&1 Internet website and the website described in these instructions.

Sign in to your account at 1&1 Internet.

  1. On the 1&1 Internet website, on the top line of the page, click Customer Login.

  2. On the CONTROL PANEL page, type your Customer ID and your password.

  3. Click Login.

Go to your domain.

  1. In the Domains & Web Space area, click Domains.

  2. On the Domains Overview page, in the list of domains, select the check box next to the domain you want to verify.

Go to the area where you can add DNS records.

  1. Click DNS in the row of options just above the table of domain names.

  2. In the drop-down list, select Edit DNS Settings.

Add an MX record.


This is just used to verify that you own your domain. It doesn’t affect anything else.

On the DNS Settings page, in the Advanced DNS settings area, create a new MX record.

  1. Look for the first empty MX record field. This is where you’ll create your MX record. It might have an MX 2 / Prio: label, for example.

  2. In the first record field for the new MX record, type or paste the value that you wrote down earlier from the Destination or Points To Address field. This is the information that you recorded in Step 1. Gather your domain information.

  3. Add to the end of that information “” (without the quotes). The final text in the first field for the MX record will look something like this, but with your unique value for the “ms” portion:

  4. The second text box (for the same MX record) is the priority field. In this box, type a number that is higher than the number for other MX records you already have. This will create an MX record that has lower priority than your other MX records.

    For example, if the highest priority you have for an MX record now is 100, you could set the new MX record’s priority to 200.

  5. Click OK.

Sign out from the 1&1 Internet website.

Click Logout in the upper-right corner of the page to sign out of your 1&1 Internet account.

After you sign out of the 1&1 Internet website, return to Office 365 to verify the domain.


Typically it takes about 15 minutes for your changes to take effect. But it can take up to 72 hours for the MX record that you created to propagate through the DNS system.

Step 3. Verify your domain with Office 365

After the record that you created for your domain has propagated successfully through the DNS system, do the following to finish verifying your domain with Office 365.

  1. In Office 365, in the header, click Admin.

  2. Under Management, click Domains.

  3. In the Domains list, find the domain that you’re verifying, and then, in the Status column, click Click to verify domain.

  4. On the Verify domain page, click Verify.

    • If domain verification succeeds, a dialog box appears to let you know that your domain has been added to your account.

    • If domain verification fails, the changes that you made at the domain registrar might need more time to propagate. Cancel the verification in Office 365, and return later to try domain verification again.


    If it has been more than 72 hours since you made the changes to your 1&1 Internet account, sign in to the 1&1 Internet website and verify that you entered the DNS record information correctly. If you entered the information incorrectly, you must remove the incorrect record and create a new one with the correct information by using the procedures in this topic.

  5. Click Finish. Your domain status is now listed as Verified in the list of domains.

After you’ve verified your domain, you can configure your domain to work with Microsoft Exchange Online, Lync Online, and SharePoint Online in Office 365.

See Also

DNS basics
Locate your domain services or buy a new domain
Add your domain to Office 365