For a few months I have been using the Zimbra Desktop client. It has a nice and smooth interface, many features and it is very reliable.
However, it seems like the desktop client doesn't support notifications for incoming mails in a shared folder.
When I receive an email, the shared folder is bolded and is followed by the number of unreaded mails, but no sound or popup notification. This results in having the client on front whole the time, which makes multitasking almost impossible.

Is there any option or workaround to be notified when receiving new messages in the shared folders?

Thanks in advance,