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Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here.

PidTagConversationTopic Canonical Property

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Contains the topic of the first message in a conversation thread.

Associated properties:

PR_CONVERSATION_TOPIC, PR_CONVERSATION_TOPIC_A, PR_CONVERSATION_TOPIC_W

Identifier:

0x0070

Data type:

PT_STRING8, PT_UNICODE

Area:

General messaging

A conversation thread represents a series of messages and replies. These properties are set for the first message in a thread, usually to the PR_NORMALIZED_SUBJECT (PidTagNormalizedSubject) property. Subsequent messages in the thread should use the same topic without modification.

The PR_CONVERSATION_INDEX (PidTagConversationIndex) property indicates the order relationship between subsequent messages and replies. Its use is optional, even if these properties are set.

A message store provider has the option of assuring that these properties are always set on incoming or outgoing messages. If these properties are already set they should not be altered. If not, they can be set to PR_NORMALIZED_SUBJECT. Any action should be taken before IMAPIProp::SaveChanges is called.

Protocol Specifications

[MS-OXPROPS]

Provides references to related Exchange Server protocol specifications.

[MS-OXOMSG]

Specifies the properties and operations that are permissible on e-mail message objects.

Header Files

Mapidefs.h

Provides data type definitions.

Mapitags.h

Contains definitions of properties listed as alternate names.

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