}

    /**
     * Creates the admin environment for LDAP connection.
     *
     * @return The admin environment for LDAP connection.
     */
    protected Hashtable<String, String> createAdminEnv() {
        return createEnvironment(//
                fessConfig.getLdapInitialContextFactory(), //
                fessConfig.getLdapSecurityAuthentication(), fessConfig.getLdapProviderUrl(), //