A method for providing single security administration comprising the steps of: allowing a client (e.g. a Tuxedo client) to access a default security plugin; issuing a call (e.g. tpinit) to an LDAP authentication server at a first (e.g. Tuxedo) server; passing query user information from the LDAP authentication server to an embedded LDAP server at a second (e.g. WLS) server; returning corresponding user information to the LDAP authentication server; and, providing an authentication token for use by the client.