I have installed and setup my zimbra server as a production server and have migrated few of my users to my zimbra server from another postfix server. My organization have a special oracle calendar server for users from different department to schedule meeting and use as their calendar. Since I have setup zimbra, I want users in my department have the ability to use their zimbra calendar feature instead of oracle because of its fantastic features, but will like to be able to auto sync the calendars back and forth. I want my users to schedule meeting from their zimbra calendar and will show in orcale if someone from other department want to see their schedule and I want my users to see their schedule for both calendar in their zimbra calendar. Is this possible? If so, how do I go about configuring it.