Ok so how does this work? How does the Zimbra web client's calendar talk to the Zimbra server? Through some kind of iCal protocol or something? Whatever method that is, could I get Outlook to speak that protocol too? I don't want to pay for (or wait for) the MAPI connector, but couldn't I find a way to get Outlook talking whatever protocol the Zimbra server uses to talk to its own web client or whatever other protocols it already supports for calendaring?