[This is preliminary documentation and subject to change.]
| Common-Name=Telex-Number | Admin-Display-Name=Telex-Number |
| Admin-Description=Telex-Number | Object-Class=Attribute-Schema |
| Attribute-ID=2.5.4.21 | OM-Syntax=4 |
| Attribute-Syntax=String(Octet) | LDAP-Display-Name=telexNumber |
| Multi-valued | System-Only=FALSE |
| Mapi-ID=\x3A2C | |
| Range 1 to 32 | |
| Schema-ID-GUID={bf967a4b-0de6-11d0-a285-00aa003049e2} | Comment=used by Exchange |