The PR_FOREIGN_ID property contains the foreign message identifier of a message.
| Header file: | EDKMDB.H |
| Applies to: | Message transfer envelope objects (information store objects) |
| Identifier: | 0x6667 |
| Property type: | PT_BINARY |
| Access: | Read/write |
The PR_FOREIGN_ID property exists only on messages. On outgoing Microsoft Exchange Server messages, this property initially does not exist. It is added by a gateway after the message has been submitted to a foreign system.