[CalendarServer-users] Creating shread calendars with Calendarserver and thunderbird

Hi All, I'm trying to accomplish an "exchange-like" functionality with CalendarServer and Thinderbird (+ Lightning ). How is it possible to set thunderbird to "get" other users free/busy state ( e.g. if I invite someone within the company for a meeting, I want to see his/her free busy/state )? Can I deal with resources, like rooms, etc? Or should we use another client, other than thunderbird? I've Calendarserver up and running now, with an LDAP backend. Can someone help me? Thanks, Tom