.forEach(v -> modifyDeleteEntry(modifyList, attrX121Address, v)));
        final String attrBusinessCategory = fessConfig.getLdapAttrBusinessCategory();
        OptionalUtil.ofNullable(user.getBusinessCategory()).filter(StringUtil::isNotBlank)
                .ifPresent(s -> modifyReplaceEntry(modifyList, attrBusinessCategory, s))
                .orElse(() -> getAttributeValueList(result, attrBusinessCategory).stream()