| Platform SDK: MAPI |
The PR_IPM_ID property was originally meant to contain an X.400 identifier of an interpersonal message.
| Header file: | MAPITAGS.H |
| Identifier: | 0x0018 |
| Property type: | PT_BINARY |
| Property tag: | 0x00180102 |
Do not use this property. It is not supported in MAPI 1.0.