Microsoft Exchange Server 2007 will reach end of support on April 11, 2017. To stay supported, you will need to upgrade. For more information, see Resources to help you upgrade your Office 2007 servers and clients.
Applies to: Exchange Server 2007, Exchange Server 2007 SP1, Exchange Server 2007 SP2, Exchange Server 2007 SP3
This topic describes the functionality that is available for developing custom applications and extensions for Microsoft Exchange Server 2007. For more information about Exchange 2007 development functionality, see the Microsoft Exchange Server 2007 Software Development Kit.
Exchange 2007 Development Technologies
Exchange 2007 includes the following new development technologies:
Exchange Web Services
Exchange .NET Framework Extensions
The Exchange Management Shell
For more information about the development technologies that are new to Exchange 2007, see the Microsoft Exchange Server 2007 SDK.
Exchange Web Services
Exchange 2007 includes a new set of Web services that enable developers to interact with Exchange mailboxes and contents by using standard HTTP. Exchange Web Services provides access to the authenticated user's mailbox and the items in the mailbox. Applications can remotely access mail messages, handle meeting requests, look up users in the address book, and determine the availability of other users.
Exchange Web Services enables in-house developers and systems integrators to create applications that enhance the Exchange experience, and facilitate the development of custom systems integration solutions.
Microsoft Exchange Server 2003 developers who currently use WebDAV, Collaboration Data Objects for Exchange 2000 Server (CDOEX), and the Exchange OLE DB (ExOLEDB) provider will find Exchange Web Services to be more robust, easier to use, and better able to handle Exchange-specific item types.
Exchange Web Services includes the following Web services:
Autodiscover Provides configuration information for setting up client applications that connect to mailbox servers.
Availability Provides free/busy data about a user's mailbox. The free/busy data is also used to identify suggested meeting times and provides client Out of Office (OOF) management functionality.
Messaging Records Management Enables the assignment of Managed E-Mail folders to mailbox users.
Notification Notifies the client application of events that are associated with a mailbox. The subscription model can be either push- or pull-based.
Synchronization Provides a one-way synchronized cached copy of a user's folders and items.
Exchange Data Service Provides the following features:
Functions to create, update, delete, copy, find, get, and move folders that are associated with a mailbox user, and also the ability to find items that are contained in a folder.
Access to the Exchange data store. A client application can create, update, delete, copy, get, move, and send items by using the Exchange Data Service Web service.
Ambiguous name resolution.
The ability to return the members of distribution list.
Access to attachments in the Exchange store.
For more information about using Exchange Web Services, see the Microsoft Exchange Server 2007 SDK.
Exchange .NET Framework Extensions
The Exchange .NET Framework Extensions provide useful classes and data structures that enable you to access and manipulate the various parts of e-mail messages. The Exchange .NET Framework Extensions includes the following namespaces:
Microsoft.Exchange.Data.Mime Enables stream-based and DOM-based access to Multipurpose Internet Mail Extensions (MIME) data, including the ability to filter MIME content.
Microsoft.Exchange.Data.TextConverters Provides classes and data structures that enable custom filtering of e-mail body content and conversion between several different formats, including HTML, RTF, and plain text.
Microsoft.Exchange.Data.iCalendar and Microsoft.Exchange.Data.Tnef Provide classes and data structures that let you read and write calendar items for appointments, meetings, and events.
Microsoft.Exchange.Data.Encoders Provides classes and data structures that let you easily convert the encoding of an e-mail message.
For more information about using the Exchange .Net Framework Extensions, see the Microsoft Exchange Server 2007 SDK.
The new Transport APIs in Exchange 2007 enable software developers to create Transport Agents. Transport Agents can be installed and enabled on computers running Exchange 2007 that have the Edge Transport or Hub Transport roles installed. Transport Agents have access to e-mail messages and their contents while the messages move through the transport services. For more information about Transport Agents, see the Microsoft Exchange Server 2007 SDK.
Exchange Management Shell
The Exchange Management Shell is a command-line management interface that can be used for server administration in an Exchange 2007 organization. The Exchange Management Shell provides interfaces and objects that are used to develop applications that manage Exchange. For more information about using the Exchange Management Shell, see the Microsoft Exchange Server 2007 SDK.
Legacy Development Technologies
The following development technologies have been replaced at least in part by development technologies provided by Exchange 2007:
Collaboration Data Objects for Exchange 2000 Server (CDOEX)
Collaboration Data Objects for Exchange Management (CDOEXM)
CDO for Workflow (CDOWF)
Exchange OLE DB (ExOLEDB) provider
Web Distributed Authoring and Versioning (WebDAV)
Exchange store event sinks
For more information about Exchange legacy development technologies, see the Microsoft Exchange Server 2007 SDK.
CDOEX is used to develop messaging applications. CDOEX is used in applications that use messaging to send and process the following:
Calendar and contact information
Access to mailboxes and public folders
CDOEX can only be run on a computer on which Microsoft Exchange is installed.
CDOEX is de-emphasized in Exchange 2007. We recommend you develop new messaging applications using the Exchange Web Services, and migrate existing applications whenever feasible.
CDOEXM was used to develop applications that manage the Exchange 2003 store. CDOEXM is not available in Exchange 2007 and has been replaced by the Exchange Management Shell. Existing applications built using CDOEXM cannot manage Exchange 2007 servers.
CDOWF is used to develop applications that create and manage workflows by using the Exchange store. CDOWF is not available in Exchange 2007. Applications that require workflow automation and orchestration should be implemented using Windows Workflow Foundation. Because maintaining applications that require Exchange workflow functionality require you keep an Exchange 2003 server in your organization, we recommend you consider migrating workflow applications whenever feasible.
MAPI is used to develop applications that access items and folders within public and private stores. MAPI is still supported in Exchange 2007. We recommend you develop new applications using by Exchange Web Services, and migrate existing applications when feasible.
The ExOLEDB provider is used to develop messaging applications. The ExOLEDB provider is used by programmers to access the Exchange store by using OLE DB and ActiveX Data Objects (ADO). Items in the store are accessed by using Structured Query Language (SQL) queries.
ExOLEDB cannot be used remotely.
ExOLEDB is de-emphasized in Exchange 2007. We recommend that you develop new messaging applications using Exchange Web Services, and migrate existing applications when feasible.
WebDAV is used to develop messaging applications. WebDAV provides access to folders, items, and item properties in the Exchange store. WebDAV can remotely access Exchange. WebDAV is de-emphasized in Exchange 2007. We recommend that you develop new messaging applications using Exchange Web Services, and migrate existing applications when feasible.
Exchange Store Event Sinks
Exchange store event sinks are used to build procedures that respond to events in the Exchange store. The Notification Web service provides an alternative to this technology.