PidTagConversationTopic Canonical Property

Applies to: Outlook 2013 | Outlook 2016

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

Remarks

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 email message objects.

Header files

Mapidefs.h

Provides data type definitions.

Mapitags.h

Contains definitions of properties listed as alternate names.

See also

MAPI Properties

MAPI Canonical Properties

Mapping Canonical Property Names to MAPI Names

Mapping MAPI Names to Canonical Property Names