The PR_EMS_AB_PREFERRED_DELIVERY_METHOD property is for X.500 compatibility and is not used by Microsoft Exchange Server.
| Header file: | EMSABTAG.H |
| Applies to: | Organization, Organizational-Person, Oganizational-Role, Organizational-Unit, and Residential Person objects (directory objects). These objects appear to MAPI as messaging_user objects, which are accessible through the MAPI IMailUser interface. |
| Identifier: | 0x810d |
| Property type: | PT_MV_LONG |
| Access: | Read/write |