Our company is currently using Zimbra 4.5.7 NE with these mail clients:
Microsoft Outlook 2002, 2003, 2007
Mozilla Thunderbird (Windows XP & Mac OS X Tiger)
Apple Mail.app (Tiger)
Microsoft Entourage (Tiger)
We've been very happy with Zimbra's performance as an IMAP and SMTP server. However, so far, our experience with Zimbra calendaring has not been quite as easy or as reliable as we'd hoped.
We'd like to get shared calendaring, invitations, etc. working reliably for everyone, while limiting our internal support costs to set it up, maintain it and educate our users.
We would consider mandating everyone switch to Thunderbird/Lightning IF the calendaring functionality/reliability is approaching 100%.
What have you had the best experience with? One of these clients with Zimbra calendaring? One of these clients with Zimbra connecting to Google calendar?
Are we better off waiting for Zimbra NE 5.0 ?