The Mandatory CNAME Record (for Autodiscover)

A CNAME field (Canonical NAME), also called an alias record, is an invisible redirection record that redirects traffic by replacing the URL of a domain or subdomain. It is especially useful for providing alternative names corresponding to different services hosted on the same machine.

Autodiscover is an Exchange web service designed to:

• Automatically configure user profile settings for Outlook 2007/2010/2013 or supported mobile devices,

• Provide Outlook 2007/2010/2013/2016 clients connected to the Exchange messaging environment with access to Exchange features.

The CNAME record contains the following information:

• The subdomain (autodiscover)

• The record type (here CNAME)

• The target address

This record must be configured as follows: