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_C3_2017829172948

  2.  

    Select DNS.

    One_DNS_C3_2017829173022

  3.  

    On the DNS page, choose Web DNS.

    One_WebDNS_C3_2017829173049

  4. type or copy and paste the 

    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 

    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_C3_2017829173441

  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. Go to the Domains page

    .

  2.  

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

    One_O365_selectDomain_C3_2017829173134

  3.  

    On the Setup page, choose Start setup.

    One_O365_StartSetup_C3_2017829173157

  4.  

    On the Verify domain page, select Add a TXT record instead, and then choose Next.

    One_O365_AddTXTInstead_C3_2017829173239

  5.  
     

    Choose Next, and then choose Verify.

    One_O365_Verify_C3_2017829173257

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

Follow the steps below.

  1. You'll be prompted to log in. 

    To get started, go to your domains page at One.com by using this link .

    One_login_C3_2017829173316

  2.  

    Select DNS.

    One_DNS_C3_2017829173342

  3.  

    On the DNS page, c hoose Mail DNS.

    One_MailDNS_C3_201782917343

  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_C3_2017829173512

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

Add the CNAME records that are required for Office 365

Follow the steps below.

  1. You'll be prompted to log in.
     

    To get started, go to your domains page at One.com by using this link .

    One_login_C3_2017829173529

  2.  

    Select DNS.

    One_DNS_C3_2017829173549

  3.  

    On the DNS page, choose Web DNS.

    One_WebDNS_C3_2017829173614

  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_C3_2017829173647

  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. Need examples? Check out these details and sample SPF records . To validate your SPF record, you can use one of these SPF validation tools .

Follow the steps below.

  1. You'll be prompted to log in. 

    To get started, go to your domains page at One.com by using this link .

    One_login_C3_201782917374

  2.  

    Select DNS.

    One_DNS_C3_2017829173718

  3. On the DNS page, c hoose Web DNS.

    One_WebDNS_C3_2017829173735

  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_C3_2017829173756

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

Add the two SRV records that are required for Office 365

Follow the steps below.

  1. You'll be prompted to log in.
     

    To get started, go to your domains page at One.com by using this link .

    One_login_C3_2017829173812

  2.  

    Select DNS.

    One_DNS_C3_2017829173828

  3. On the DNS page, c hoose Web DNS.

    One_WebDNS_C3_2017829173846

  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_C3_201782917396

  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 .

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