Using Zimbra Desktop - the size of my mailbox is show on the top-left, but it includes the live mailbox AND anything I have archived locally-only.

If there is a quota set (say, 500 meg), and my live Zimbra mailbox is under that, but I'm over 500 meg including what I have archived... how is this calculated? What does ZDesktop show? Is there a way to distinguish live-mailbox-quota and size versus how much is locally archived? How would a user know?

thanks,
Greg