[MS-ASCMD]: ActiveSync Command Reference Protocol Specification

1.4 Relationship to Other Protocols
The ActiveSync commands described in this document are sent and received over a Hypertext
Transfer Protocol (HTTP) connection, as described in [RFC2616] in an HTTP POST method. The
information contained in the HTTP POST header is described in [MS-ASHTTP]. The information
contained in the HTTP message is sent and received in Wireless Application Protocol (WAP)
Binary XML (WBXML) format, as described in [MS-ASWBXML], where the content of the WBXML
adheres to the commands described in this document.
Some of the ActiveSync commands described in this document are used to synchronize or retrieve
more than one class of content. For example, the Ping command (section 2.2.2.11) can be used to
monitor changes to the e-mail, note, contact, calendar, or task classes. The elements included in the
Ping command change depending on which content class is being monitored. Because each content
class is used by multiple commands, each content class is described by an individual protocol. The
content class protocols are described in [MS-ASEMAIL], [MS-ASCNTC], [MS-ASDOC], [MS-ASCAL],
[MS-ASNOTE], [MS-ASMS], and [MS-ASTASK].
Another protocol that contains elements used by multiple commands is [MS-ASAIRS]. [MS-ASAIRS]
describes the AirSyncBase namespace, which is used by multiple commands to specify the
formatting preference of body content, truncation sizes, and other commonly used elements.
This document describes all of the ActiveSync commands except for the Provision command, which
is described in [MS-ASPROV] section 2.2.2.43.
The Autodiscover command (section 2.2.2.1) is described in this document, but more information
about Autodiscover publishing and lookup are available in [MS-OXDSCLI].
All simple data types in this document conform to the data type definitions in [MS-ASDTYPE].
For information about how to control the view of related e-mail messages or conversations, see
[MS-ASCON].
For information about how outbound Short Message Service (SMS) e-mail messages are sent from
mobile devices, see [MS-ASMS].
1.5 Prerequisites/Preconditions
This protocol assumes that authentication has been performed by the underlying protocols.
1.6 Applicability Statement
This protocol is applicable in scenarios where a client has to synchronize its messages and files with
a server.
1.7 Versioning and Capability Negotiation
None.
1.8 Vendor-Extensible Fields
None.
1.9 Standards Assignments
None.
[MS-ASCMD] — v20110315
ActiveSync Command Reference Protocol Specification
Copyright © 2011 Microsoft Corporation.
Release: Tuesday, March 15, 2011
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