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	Description	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.	[MS-ASAIRS]
Exchange ActiveSync: Calendar Class Protocol	Enables the interchange of calendar data between a server and a client device.	[MS-ASCAL]
Exchange ActiveSync: Command Reference Protocol	Enables the synchronization of e-mail, Short Message Service (SMS) messages, attachments, folders, contact (2) information, meetings, calendar data, tasks, notes, and documents.	[MS-ASCMD]
Exchange ActiveSync: Contact Class Protocol	Enables the interchange of contact (1) data between a server and a client device.	[MS-ASCNTC]
Exchange ActiveSync: Conversations Protocol	Improves the ways in which e-mails are displayed in the conversation view.	[MS-ASCON]
Exchange ActiveSync: Document Class Protocol	Communicates document data from the server to the client.	[MS-ASDOC]
Exchange ActiveSync: Data Types	Data types used by the Exchange ActiveSync XML schema definitions (XSDs).	[MS-ASDTYPE]
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.	[MS-ASEMAIL]
Exchange ActiveSync: HTTP Protocol	Enables a client device to synchronize data with the data that is stored on the server.	[MS-ASHTTP]
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.	[MS-ASMS]
Exchange ActiveSync: Notes Class Protocol	Provides the mechanisms that allow a mobile client to synchronize user notes with a server.	[MS-ASNOTE]
Exchange ActiveSync: Provisioning Protocol	Enables servers to communicate security policy settings to client devices.	[MS-ASPROV]
Exchange ActiveSync: Rights Management Protocol	Describes the actions allowed on an e-mail message and its attachments.	[MS-ASRM]
Exchange ActiveSync: Tasks Class Protocol	Enables the interchange of task data between a client and a server.	[MS-ASTASK]
Exchange ActiveSync: WAP Binary XML (WBXML) Algorithm	Enables Wireless Application Protocol (WAP) Binary XML (WBXML) encoding.	[MS-ASWBXML]