Create DNS records at IDC1 for Office 365

Caution: The IDC1 website doesn't support SRV records, which means that several Skype for Business Online and Outlook Web App features won’t work. No matter which Office 365 operated by 21Vianet plan you use, there are significant service limitations, and you may want to switch to a different DNS hosting provider.

If despite the service limitations, you choose to manage your own Office 365 DNS records at IDC1, follow the steps in this article to verify your domain and set up DNS records for email, Lync, and so on. here’s how to set them up.

These are the main records to add.

After you add these records at IDC1, your domain will be set up to work with Office 365 services, though not with the Lync Online and Outlook Web App features mentioned above.

If you have a SharePoint Online Public Website, you can set it up to use your custom domain for the website URL address, like www.your_domain.com.

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.

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. In your browser, go to IDC1 DNS management system.

    Sign in to DNS management system

  2. In the 域名 (domain name) box, type the name of the domain that you want to update.

  3. In the 管理密码 (administration password) box, type the administration password for your domain name.

  4. Click 登录 (sign in).

    The DNS records page for your domain opens.

  5. On the 新建子域名 (add new subdomain) tab, in the 指向类型 (record type) drop-down list, select TXT 记录 (TXT record).

    Add TXT record

  6. Make sure that the fields are set to precisely the following values for the empty record:

    • 子域名 (subdomain): Leave the box blank.

    • 域名 (points to domain): Paste Destination or Points to Address value 字符串记录 (value): Paste the Destination or Points to Address from the table in Office 365, for example MS=msXXXXXXX. How do I find this?

    • TTL: 3600

  7. Click 增加 (add).

  8. Click 重启EDNS服务器 (restart EDNS server) for the changes to take effect 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 Manage domains page, select the domain that you are verifying and then, in the Action column for that domain, choose Start setup.

    O365-BP-Verify-1-2

  3. On the Add this TXT record to show you own domain_name page, choose Okay, I've added the record.

    O365-BP-Verify-1-3

  4. Choose Next.

    O365-BP-Verify-1-4

Add an MX record to route email

  1. In your browser, go to IDC1 DNS management system.

    Sign in to DNS management system

  2. In the 域名 (domain name) box, type the name of the domain that you want to update.

  3. In the 管理密码 (administration password) box, type the administration password for your domain name.

  4. Click 登录 (sign in).

    The DNS records page for your domain opens.

  5. On the 新建子域名 (add new subdomain) tab, in the 指向类型 (record type) drop-down list, select MX 记录 (邮箱) (MX record).

    Add MX record

  6. Make sure that the fields are set to precisely the following values for the empty record:

    • 子域名 (subdomain): Leave the box blank.

    • 邮箱服务器 (mailbox server): Paste the Points to address value from Office 365: <domain-key>.mail.protection.partner.outlook.cn

      Note: Get your <domain-key> from your Office 365 portal account.
      How do I find this?

    • TTL: 3600

    • 优先级 (priority): 0

  7. Click 增加 (add).

  8. Click 重启EDNS服务器 (restart EDNS server) for the changes to take effect across the Internet.

  9. If you have any MX records for this domain that send email to someplace other than Office 365, remove them:

    1. Click the 子域名列表 (subdomain list) tab.

    2. On the row of the obsolete record, click 删除 (remove).

Add CNAME records

  1. Add the email (Exchange) Autodiscover CNAME record.

    1. In your browser, go to IDC1 DNS management system.

      Sign in to DNS management system

    2. In the 域名 (domain name) box, type the name of the domain that you want to update.

    3. In the 管理密码 (administration password) box, type the administration password for your domain name.

    4. Click 登录 (sign in).

      The DNS records page for your domain opens.

    5. On the DNS records page for your domain, on the 新建子域名 (add new subdomain) tab, in the 指向类型 (record type) drop-down list, select CNAME/别名 (CNAME/alias).

      Add CNAME record

    6. Make sure that the fields are set to precisely the following values for the empty record:

      • 子域名 (subdomain): autodiscover

      • 域名 (points to domain): autodiscover.partner.outlook.cn

      • TTL: 3600

    7. Click 增加 (add).

    8. Click 重启EDNS服务器 (restart EDNS server) for the changes to take effect across the Internet.

  2. Add the Lync Autodiscover CNAME record.

    1. On the DNS records page for your domain, on the 新建子域名 (add new subdomain) tab, in the 指向类型 (record type) drop-down list, select CNAME/别名 (CNAME/alias).

    2. Make sure that the fields are set to precisely the following values for the empty record:

      • 子域名 (subdomain): lyncdiscover

      • 域名 (points to domain): webdir.online.partner.lync.cn

      • TTL: 3600

    3. Click 增加 (add).

    4. Click 重启EDNS服务器 (restart EDNS server) for the changes to take effect across the Internet.

    5. Add the Lync SIP CNAME record.

      1. On the DNS records page for your domain, on the 新建子域名 (add new subdomain) tab, in the 指向类型 (record type) drop-down list, select CNAME/别名 (CNAME/alias).

      2. Make sure that the fields are set to precisely the following values for the empty record:

        • 子域名 (subdomain): sip

        • 域名 (points to domain): sipdir.online.partner.lync.cn

        • TTL: 3600

      3. Click 增加 (add).

      4. Click 重启EDNS服务器 (restart EDNS server) for the changes to take effect across the Internet.

  3. Add the Office 365 MSOID CNAME record. This is an additional record that is required for Office 365.

    1. On the DNS records page for your domain, on the 新建子域名 (add new subdomain) tab, in the 指向类型 (record type) drop-down list, select CNAME/别名 (CNAME/alias).

    2. Make sure that the fields are set to precisely the following values for the empty record:

      • 子域名 (subdomain): msoid

      • 域名 (points to domain): clientconfig.partner.microsoftonline-p.net.cn

      • TTL: 3600

    3. Click 增加 (add).

    4. Click 重启EDNS服务器 (restart EDNS server) for the changes to take effect across the Internet.

Add a TXT record to help prevent spam

  1. In your browser, go to IDC1 DNS management system.

    Sign in to DNS management system

  2. In the 域名 (domain name) box, type the name of the domain that you want to update.

  3. In the 管理密码 (administration password) box, type the administration password for your domain name.

  4. Click 登录 (sign in).

    The DNS records page for your domain opens.

  5. On the 新建子域名 (add new subdomain) tab, in the 指向类型 (record type) drop-down list, select TXT 记录 (TXT record).

    Add TXT record

  6. Make sure that the fields are set to precisely the following values for the empty record:

    • 子域名 (subdomain): Leave the box blank.

    • 域名 (points to domain): v=spf1 include:spf.protection.partner.outlook.cn -all

    • TTL: 3600

  7. Click 增加 (add).

  8. Click 重启EDNS服务器 (restart EDNS server) for the changes to take effect across the Internet.

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