[CalendarServer-users] which ladp attributes for location / resources

Hi, hope you can help me ... i use calendarserver 2.x @ debian testing with ldap. So everythings fine but i wann use locations (e.g. rooms) via apples ical. As i type a location a exclamation mark appears ... so he cant resolve the location. In my ldap there are two ou's called locations and resouces but which arguments are needed? I found "rooms" but that does not work for me, it seems that the calendar server is searching for an email-address (i use room only with cn=room 008b)? I know this behavior from exchange - a room with a mailaddress, so the room can write back that he's booked. Can anybody tell me which attributes are needed for locations or is something else wrong? thanks in advance Simon