I've just discovered Zimbra, while searching for a way around the problems and limitations of using Entourage for our Mac users. Our office has about 10 of them, and about 40 PC users (running AD & Exchange on Win2K3 servers).
Management is tired of the problems trying to book resources (meeting rooms and such) on the Exchange/Outlook-based Calendar - since that functionality is gimped/broken on Entourage and in the Outlook Web Client (OWA).
They'd like a solution, but I just know that they'd put a halt on moving everyone to a new mail client (we're a computer-centric company, but they are loathe to spend any time or money on technology or infrastructure - its very frustrating)... Forcing all of the (PC-based) managers to learn a new mail client is basically a lost-cause (upper management has zero leadership and doesn't enforce policy, so the middle-managers will just whine until the whole project is scrapped).
However, I have hope: I saw it mentioned in one of the guides that there may be a way for a Zimbra server to "share" duties with an Exchange server in a single domain. Is that true? If so, how stable is that? My thought would be to move the Mac users over to a Zimbra solution, but still retain the core of the email & calendaring system in Exchange.
How do-able is this? Any thoughts or comments?
Thanks a bunch, take care,