Since I can't test the full professional version yet, I need to ask a couple questions.

I know Zimbra works well with Microsoft Outlook.

What I need to know is how well it emulates exchange when connecting with Microsoft Entourage.

Calendaring, this is my main concern. Will Entourage/Zimbra enable me to work the same way as exchange? Can I easily see another users free/busy schedule or access there calendar (from within Entourage)? When I get in appointment in an email received to Entourage, will it schedule it in my "Main Calendar"?

Additionally, I see people mention that there will be no 'official' support for Entourage 2008. Can you elaborate what functionality I will be using?