PidTagAttachExtension Canonical Property

Applies to: Outlook 2013 | Outlook 2016

Contains a file name extension that indicates the document type of an attachment.

Associated properties:
PR_ATTACH_EXTENSION, PR_ATTACH_EXTENSION_A, PR_ATTACH_EXTENSION_W
Identifier:
0x3703
Data type:
PT_STRING8, PT_UNICODE
Area:
Message attachment

Remarks

These properties are set by the client application at submission time.

The messaging system uses PR_ATTACH_EXTENSION when converting message attachments (in-route conversion) or launching applications based on attachments in received messages. If the sending client does not provide a value for these properties, the message store handling the attachment is not obligated to generate it. The receiving client should first check for PR_ATTACH_EXTENSION, and if it is not provided, should parse the file name extension from the attachment's PR_ATTACH_FILENAME (PidTagAttachFilename) or PR_ATTACH_LONG_FILENAME (PidTagAttachLongFilename) property.

Protocol specifications

[MS-OXCMSG]

Handles message and attachment 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