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2.2.4 Exchange ActiveSync Protocols

Exchange ActiveSync protocols enable data to be shared and synchronized between a server and a mobile client device. The Exchange ActiveSync protocols also provide a notification mechanism that allows clients to synchronize updates when changes occur on the server; for example, when a new e-mail message arrives The hierarchical relationships between the Exchange ActiveSync protocols are illustrated in the following figure, in which each protocol is represented by its specification short name.


Figure 4: Exchange ActiveSync specifications

The Exchange ActiveSync protocols are listed in the following table.

Protocol or other technology name


Short name

Exchange ActiveSync: AirSyncBase Namespace Protocol

Used by the Exchange ActiveSync commands to identify the size, type, and content of the data sent by and returned to the client.


Exchange ActiveSync: Calendar Class Protocol

Enables the interchange of calendar data between a server and a client device.


Exchange ActiveSync: Command Reference Protocol

Enables the synchronization of e-mail, Short Message Service (SMS) messages, attachments, folders, contact (3) information, meetings, calendar data, tasks, notes, and documents.


Exchange ActiveSync: Contact Class Protocol

Enables the interchange of contact (2) data between a server and a client device.


Exchange ActiveSync: Conversations Protocol

Improves the ways in which e-mails are displayed in the conversation view.


Exchange ActiveSync: Document Class Protocol

Communicates document data from the server to the client.


Exchange ActiveSync: Data Types

Data types used by the Exchange ActiveSync XML schema definitions (XSDs).


Exchange ActiveSync: Email Class Protocol

An XML representation of e-mail data sent or received on mobile devices that communicate by using the Exchange ActiveSync protocols.


Exchange ActiveSync: HTTP Protocol

Enables a client device to synchronize data with the data that is stored on the server.


Exchange ActiveSync: Short Message Service (SMS) Protocol

Provides the mechanisms for a mobile device to synchronize SMS messages with the server and for the server to send SMS messages through the mobile device.


Exchange ActiveSync: Notes Class Protocol

Provides the mechanisms that allow a mobile client to synchronize user notes with a server.


Exchange ActiveSync: Provisioning Protocol

Enables servers to communicate security policy settings to client devices.


Exchange ActiveSync: Rights Management Protocol

Describes the actions allowed on an e-mail message and its attachments.


Exchange ActiveSync: Tasks Class Protocol

Enables the interchange of task data between a client and a server.


Exchange ActiveSync: WAP Binary XML (WBXML) Algorithm

Enables Wireless Application Protocol (WAP) Binary XML (WBXML) encoding.


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