.stream().forEach(v -> modifyDeleteEntry(modifyList, attrGivenName, v)));
        final String attrMail = fessConfig.getLdapAttrMail();
        OptionalUtil.ofNullable(user.getMail()).filter(StringUtil::isNotBlank).ifPresent(s -> modifyReplaceEntry(modifyList, attrMail, s))
                .orElse(() -> getAttributeValueList(result, attrMail).stream().forEach(v -> modifyDeleteEntry(modifyList, attrMail, v)));