Web services reference for Exchange 2013

Applies to:  Exchange 2013 | Exchange Online | Exchange Server 2007 | Exchange Server 2010 

This section includes reference information for the APIs that are included in Exchange. This section includes the following content:

• Exchange Web Services (EWS) reference — Contains API reference documentation for the Exchange Web Services (EWS) API. This is the primary API for creating clients and services that connect to Exchange to get access to mailbox information. This content includes information about the operations that are available in EWS, and XML reference documentation that provides information about the instance XML that is sent to and received from Exchange.

• Autodiscover web service reference for Exchange 2013 — Contains XML API reference for the Autodiscover services provided by Exchange. The Autodiscover APIs provide provisioning information to client applications that enables them to automatically discover the Exchange service endpoints.

• Unified Messaging web service reference for Exchange 2013 — Contains the XML API reference for the Unified Messaging (UM) web service. The UM web service provides client applications access to UM functionality in Exchange. Note that EWS also provides UM functionality.

For information about which set of APIs to use, see Current development technologies for Exchange.

The Exchange XML reference is based on the XML instances that are sent between the client and the server. The XML is described in the WSDL and XSD files for the EWS and SOAP Autodiscover services. The UM web service and the POX Autodiscover service do not have published WSDL and schema files that describe their structure. The XML reference for the services that do not have schema files is based on the XML instances that can be observed and captured as they are exchanged between the client and the service.