[This is preliminary documentation and subject to change.]
| Common-Name=MAPI-ID | Admin-Display-Name=MAPI-ID |
| Admin-Description=MAPI-ID | Object-Class=Attribute-Schema |
| Attribute-ID=1.2.840.113556.1.2.49 | OM-Syntax=2 |
| Attribute-Syntax=Integer | LDAP-Display-Name=mAPIID |
| Single-valued | System-Only=TRUE |
| Mapi-ID=\x80CE | |
| Schema-ID-GUID={bf9679b7-0de6-11d0-a285-00aa003049e2} | Comment=used by Exchange |