.forEach(v -> modifyDeleteEntry(modifyList, attrLabeledURI, v)));
        final String attrRoomNumber = fessConfig.getLdapAttrRoomNumber();
        OptionalUtil.ofNullable(user.getRoomNumber())
                .filter(StringUtil::isNotBlank)
                .ifPresent(s -> modifyReplaceEntry(modifyList, attrRoomNumber, s))
                .orElse(() -> getAttributeValueList(result, attrRoomNumber).stream()