[dpmchris]

I have only spent a minimal amount of time working on this... YMMV.

As was in iPhone OS 2.0 and Zimbra 5.0.9 NE and later you get multiple personal calendars (color coded) and personal contacts (multiple address books show up as separate groups.)

With iPhone OS 3.0 we gain the ability to send invites to meetings in my testing, but ONLY if you are using ActiveSync, and only with your primary ActiveSync calendar. CalDav is or isn't working (see the CalDav thread) but I haven't tested, nor have I tested Subscribing to shared ics URLs.

It appears that if you are using ActiveSync for mail you CAN'T use Mail search to search messages on the server. This does work for MobileMe accounts, and apparently for REAL Exchange ActiveSync accounts (there might be deviations in the AS implementation that explain this?) However you CAN search through server mail in IMAP accounts, including those on Zimbra, in my test.

The addition of LDAP directory for contacts was not functional for me. I am still beating on that. Anybody else figure it out?