LDAP (or Lightweight Directory Access Protocol) is an Internet protocol that allows a server administrator to publish user information (called "attributes") on an LDAP server. When LDAP is enabled by your administrator, other Internet user with LDAP-enabled client programs can access your information. You can set up Web Messaging so that your LDAP information is hidden from other Internet users, even if your Administrator has made the information available.
Select Change User Information under Personal Account Options.
Near the bottom of the Change User Information page, select Hide from Information Services.
Click the Save button.