Create DNS records at Register.com for Office 365

Check the Domains FAQ if you don't find what you're looking for.

If Register.com is your DNS hosting provider, follow the steps in this article to verify your domain and set up DNS records for email, Skype for Business Online, and so on.

These are the main records to add. Follow the steps below or watch the video.

After you add these records at Register.com, your domain will be set up to work with Office 365 services.

To learn about webhosting and DNS for websites with Office 365, see Use a public website with Office 365.

Note

Typically it takes about 15 minutes for DNS changes to take effect. However, it can occasionally take longer for a change you've made to update across the Internet's DNS system. If you're having trouble with mail flow or other issues after adding DNS records, see Find and fix issues after adding your domain or DNS records in Office 365.

Add a TXT record at Register.com to verify that you own the domain

Before you use your domain with Office 365, we have to make sure that you own it. Your ability to log in to your account at your domain registrar and create the DNS record proves to Office 365 that you own the domain.

Note

This record is used only to verify that you own your domain; it doesn't affect anything else. You can delete it later, if you like.

Follow the steps below or watch the video (start at 0:44).

  1. To get started, go to your domains page at Register.com by using this link. You'll be prompted to sign in.

  2. Select Domains.

  3. Select Manage.

  4. Find the row that contains the name of the domain that you want to modify; and then, in that row, select Manage.

  5. Scroll down to the Advanced Technical Settings section, and then select Edit TXT Records (SPF).

  6. In the boxes for the new record, type or copy and paste the values from the following table.

    Host Name
    TXT Record
    @
    MS=ms XXXXXXXX
    Note: This is an example. Use your specific Destination or Points to Address value here, from the table in Office 365. How do I find this?
  7. Select Continue.

  8. On the next page, select Continue again to confirm your changes.

  9. Wait a few minutes before you continue, so that the record you just created can update across the Internet.

Now that you've added the record at your domain registrar's site, you'll go back to Office 365 and request Office 365 to look for the record.

When Office 365 finds the correct TXT record, your domain is verified.

  1. In the admin center, go to the Settings > Domains page.

  2. On the Domains page, select the domain that you are verifying.

  3. On the Setup page, select Start setup.

  4. On the Verify domain page, select Verify.

Note

Typically it takes about 15 minutes for DNS changes to take effect. However, it can occasionally take longer for a change you've made to update across the Internet's DNS system. If you're having trouble with mail flow or other issues after adding DNS records, see Find and fix issues after adding your domain or DNS records in Office 365.

Add an MX record so email for your domain will come to Office 365

Follow the steps below or watch the video (start at 3:32).

  1. To get started, go to your domains page at Register.com by using this link. You'll be prompted to sign in.

  2. Select Domains.

  3. Select Manage.

  4. Find the row that contains the name of the domain that you want to modify; and then, in that row, select Manage.

  5. Scroll to the Advanced Technical Settings section, and then select Edit Mail Exchanger Records.

    Select Edit Mail Exchanger Records

  6. In the boxes for the new record, type or copy and paste the values from the following table.

    (Choose the Priority value from the drop-down list.)

    Host Name Priority Mail Server
    @
    High
    For more information about priority, see What is MX priority?
    <domain-key> .mail.protection.outlook.com.
    This value MUST end with a period (.)
    Note: Get your <domain-key> from your Office 365 account.
    How do I find this?

    Copy and paste the value from the table

  7. If there were any other MX records already listed, select each of those records to be deleted.

    Select each record to delete

  8. Select Continue.

    Select Continue

  9. On the next page, select Continue again to confirm and save your changes.

    Select Continue

Add the CNAME records that are required for Office 365

Follow the steps below or watch the video (start at 4:23).

  1. To get started, go to your domains page at Register.com by using this link. You'll be prompted to sign in.

  2. Select Domains.

  3. Select Manage.

  4. Find the row that contains the name of the domain that you want to modify; and then, in that row, select Manage.

  5. Scroll to the Advanced Technical Settings section, and then select Edit Domain Aliases Records.

    Select Edit Domain Aliases Records

  6. Select Add more domain aliases.

    Select Add more domains aliases

  7. Add the required CNAME records.

    In the boxes for the new record, type or copy and paste the values from the first row of the following table.

    First field (unlabeled) Points to
    autodiscover
    autodiscover.outlook.com.
    This value MUST end with a period (.)
    sip
    sipdir.online.lync.com.
    This value MUST end with a period (.)
    lyncdiscover
    webdir.online.lync.com.
    This value MUST end with a period (.)
    enterpriseregistration
    enterpriseregistration.windows.net.
    This value MUST end with a period (.)
    enterpriseenrollment
    enterpriseenrollment-s.manage.microsoft.com.
    This value MUST end with a period (.)

    Copy and paste the DNS values from the table

  8. When you have added all of the CNAME records that you need, select Continue.

    Select Continue

  9. On the next page, select Continue again to confirm and save your changes.

    Select Continue

Add a TXT record for SPF to help prevent email spam

Important

You cannot have more than one TXT record for SPF for a domain. If your domain has more than one SPF record, you'll get email errors, as well as delivery and spam classification issues. If you already have an SPF record for your domain, don't create a new one for Office 365. Instead, add the required Office 365 values to the current record so that you have a single SPF record that includes both sets of values.

Follow the steps below or watch the video (start at 5:12).

  1. To get started, go to your domains page at Register.com by using this link. You'll be prompted to sign in.

  2. Select Domains.

  3. Select Manage.

  4. Find the row that contains the name of the domain that you want to modify; and then, in that row, select Manage.

  5. Scroll to the Advanced Technical Settings section, and then select Edit TXT Records (SPF).

    Select Edit TXT Records (SPF)

  6. In the boxes for the new record, type or copy and paste the values from the following table.

    Host Name TXT Record
    @
    v=spf1 include:spf.protection.outlook.com -all
    Note: We recommend copying and pasting this entry, so that all of the spacing stays correct.

    Copy and paste the values from the table

  7. Select Continue.

    Select Continue

  8. On the next page, select Continue again to confirm and save your changes.

    Select Continue

Add the two SRV records that are required for Office 365

Follow the steps below or watch the video (start at 5:55).

  1. To get started, go to your domains page at Register.com by using this link. You'll be prompted to sign in.

  2. Select Domains.

  3. Select Manage.

  4. Find the row that contains the name of the domain that you want to modify; and then, in that row, select Manage.

  5. Scroll to the Advanced Technical Settings section, and then select Edit SRV Records.

    Select Edit SRV Records

  6. Add the first of the two SRV records:

    In the boxes for the new record, type or copy and paste the values from the first row of the following table.

    (Choose the Priority value from the drop-down list.)

    Service Proto Name Priority Weight Port Target
    _sip
    _tls
    @
    High
    1
    443
    sipdir.online.lync.com.
    This value MUST end with a period (.)
    _sipfederationtls
    _tcp
    @
    High
    1
    5061
    sipfed.online.lync.com.
    This value MUST end with a period (.)

    Copy and paste the values from the table

  7. Select Add more SRV records.

    Select Add more SRV records

  8. Add the second SRV record:

    Type or copy and paste the values from the second row of the table above into the boxes for the second record.

  9. When you have added both of the SRV records, select Continue.

    Select Continue

  10. On the next page, select Continue again to confirm and save your changes.

    Select Continue

Note

Typically it takes about 15 minutes for DNS changes to take effect. However, it can occasionally take longer for a change you've made to update across the Internet's DNS system. If you're having trouble with mail flow or other issues after adding DNS records, see Find and fix issues after adding your domain or DNS records in Office 365.