[This is preliminary documentation and subject to change.]
| Common-Name=Surname | Admin-Display-Name=Surname |
| Admin-Description=Surname | Object-Class=Attribute-Schema |
| Attribute-ID=2.5.4.4 | OM-Syntax=64 |
| Attribute-Syntax=String(Unicode) | LDAP-Display-Name=sn |
| Single-valued | System-Only=FALSE |
| Mapi-ID=\x3A11 | |
| Range 1 to 64 | |
| Schema-ID-GUID={bf967a41-0de6-11d0-a285-00aa003049e2} | Comment=used by Exchange |