The PR_EMS_AB_INTERNATIONAL_ISDN_NUMBER property is for X.500 compatibility and is not used by Microsoft Exchange Server.
| Header file: | EMSABTAG.H |
| Applies to: | All directory objects. These objects appear to MAPI as messaging_user objects, which are accessible through the MAPI IMailUser interface. |
| Identifier: | 0x80be |
| Property type: | PT_MV_TSTRING |
| Access: | Read/write |
| Unicode: | Yes |