This article discusses autodiscovery and autoconfiguration DNS records.
By default, cPanel automatically creates autodiscovery and autoconfiguration DNS records for your domain. These records enable the Microsoft Outlook and Mozilla Thunderbird e-mail clients to automatically discover and configure access to your e-mail accounts.
You can use the DNS Zone Editor in cPanel to view the records (replace example.com with your own domain name):
For more information about the Microsoft Exchange autodiscover service, please visit https://technet.microsoft.com/en-us/library/bb124251.aspx.
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