The built-in LDAP server enables access to public and private contacts (you can use either the secured or the unencrypted access — for detail see chapter 6  Services) stored in KMS for email client programs supporting the LDAP protocol (Lightweight Directory Access Protocol). This protocol is supported by all commonly used email clients. This protocol is supported by all most common email clients.

These clients can enable users to search for users' data (typically email addresses) and automatic completion of email addresses when they are inserted.