Create DNS records at One.com for Office 365

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

If One.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.

After you add these records at One.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 Troubleshoot issues after changing your domain name or DNS records.

Add a TXT record for verification

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.

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

    One_login

  2. Select DNS.

    One_DNS

  3. On the DNS page, choose Web DNS.

    One_WebDNS

  4. In the Personal web DNS settings section, enter the new TXT record.

    (If records already exist, use the last row of boxes to enter the new record.)

    Under Type, choose TXT, and then copy and paste the values from the table below into the boxes for the new record.

    Domain Type TTL Priority Value
    ( leave blank )
    TXT
    3600 (seconds)
    ( leave blank )
    MS=msXXXXXXX
    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?

    One_VerificationTXT_values

  5. Select the green + icon to save the record.

  6. 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. Choose Setup > Domains.

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

    Domain name selected in Office 365 Admin Center

  3. On the Setup page, choose Start setup.

    Start setup

  4. On the Verify domain page, choose Verify.

    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 Troubleshoot issues after changing your domain name or DNS records.

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

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

    One_login

  2. Select DNS.

    One_DNS

  3. On the DNS page, choose Web DNS.

    One_WebDNS

  4. Delete any existing MX records by choosing the red - icon next to each record.

  5. In the Personal mail DNS settings section, enter the new MX record. Under Type, choose MX, and then type or copy and paste the values from the table below into the boxes for the new record.

    Domain Type Priority Server
    (your domain)
    MX
    10
    For more information about priority, see What is MX priority?
    <domain-key> .mail.protection.outlook.com
    Note: Get your <domain-key> from your Office 365 portal account. How do I find this?

    One_MX_values

  6. Select the green + icon to save the record.

Add the CNAME records that are required for Office 365

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

    One_login

  2. Select DNS.

    One_DNS

  3. On the DNS page, choose Web DNS.

    One_WebDNS

  4. In the Personal mail DNS settings section, enter the new CNAME records.

    Under Type, choose CNAME, and then type or copy and paste the values from the table below into the boxes for the new record.

    Note

    If records already exist in the Personal web DNS settings section, use the last row of boxes to enter a new record.

    Domain (Hostname) Type Value (Destination)
    autodiscover
    CNAME
    autodiscover.outlook.com
    sip
    CNAME
    sipdir.online.lync.com
    lyncdiscover
    CNAME
    webdir.online.lync.com
    msoid
    CNAME
    clientconfig.microsoftonline-p.net
    enterpriseregistration
    CNAME
    enterpriseregistration.windows.net
    enterpriseenrollment
    CNAME
    enterpriseenrollment.manage.microsoft.com

    One_CNAME_values

  5. Select the green + icon to save the record.

  6. Repeat the previous steps to create the other five CNAME records. For each record, type of copy and paste the values from the next row of the table above into the boxes for that record.

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.

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

    One_login

  2. Select DNS.

    One_DNS

  3. On the DNS page, choose Web DNS.

    One_WebDNS

  4. In the Personal web DNS settings section, enter the new TXT record. Under Type, choose TXT, and then type or copy and paste the values from the table below into the boxes for the new record.

    Note

    If records already exist in the Personal web DNS settings section, use the last row of boxes to enter a new record.

    Domain Type TTL Priority Value
    (leave blank)
    TXT
    3600 (seconds)
    (leave blank)
    v=spf1 include:spf.protection.outlook.com -all
    Note: We recommend copying and pasting this entry, so that all of the spacing stays correct.

    One_TXT_SPF_values

  5. Select the green + icon to save the record.

Add the two SRV records that are required for Office 365

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

    One_login

  2. Select DNS.

    One_DNS

  3. On the DNS page, choose Web DNS.

    One_WebDNS

  4. In the Personal web DNS settings section, enter the new SRV record. Under Type, choose SRV, and then type or copy and paste the values from the table below into the boxes for the new record.

    Note

    If records already exist in the Personal web DNS settings section, use the last row of boxes to enter a new record.

    Domain Type TTL Priority Value (Destination)
    _sip._tls
    SRV (Service)
    3600 (seconds)
    100
    1 443 sipdir.online.lync.com
    _sipfederationtls._tcp
    SRV (Service)
    3600 (seconds)
    100
    1 5061 sipfed.online.lync.com

    One_SRV_values

  5. Select the green + icon to save the record.

  6. Repeat the previous steps to create the other SRV record. Type or copy and paste the values from the second row of the table above into the boxes for the second record.

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 Troubleshoot issues after changing your domain name or DNS records.