The PR_ORIGINAL_SENDER_SEARCH_KEY property contains the search key for the sender of the first version of a message, that is, the message before being forwarded or replied to.
| Header file: | MAPITAGS.H |
| May be exposed by: | Message objects |
| Identifier: | 0x005C |
| Property type: | PT_BINARY |
| Property tag: | 0x005C0102 |
The PR_ORIGINAL_SENDER_SEARCH_KEY property is one of the address properties for the original sender of a message. At first submission of the message, the client application should set this property to the value of the PR_SENDER_SEARCH_KEY property. It is never changed when the message is forwarded or replied to.
For more information on the address properties, see Base Address Properties.