Autodiscover provides a mechanism for locating the settings that a client application must have in order to connect to Exchange. Microsoft Exchange Server 2010 includes the following two types of Autodiscover service:
SOAP Autodiscover service
“plain old XML” (POX) Autodiscover service
Each type of Autodiscover service can provide the configuration information that is necessary to create a connection to an Exchange server.
In Exchange 2010, we recommend that you use the SOAP Autodiscover service instead of the POX Autodiscover service. For more information, see Working with Autodiscover.
This section contains reference information for both types of Autodiscover service.