*
     * @param username The username.
     * @param password The password.
     * @return The search environment for LDAP connection.
     */
    protected Hashtable<String, String> createSearchEnv(final String username, final String password) {
        return createEnvironment(//
                fessConfig.getLdapInitialContextFactory(), //
                fessConfig.getLdapSecurityAuthentication(), //