protected String[] targetUsers;

    @Override
    public void update(final User user) {
        final String username = user.getName();
        final String password = user.getOriginalPassword();
        changePassword(username, password);
    }

    @Override
    public void delete(final User user) {
        final String username = user.getName();
        if (isTargetUser(username)) {

            final List<SearchResult> result) {
        final List<ModificationItem> modifyList = new ArrayList<>();
        if (user.getOriginalPassword() != null) {
            modifyReplaceEntry(modifyList, "userPassword", user.getOriginalPassword());
        }

        final String attrSurname = fessConfig.getLdapAttrSurname();
        OptionalUtil.ofNullable(user.getSurname())