Hi, I am trying to create ical Event in Apple - calender (ical server) using java ical4j Libraries and jackrabbit2.6 libraries to make http call's to server. Now i am able to create event, but the issue is when i create the event , the server is not actually blocking the conference room which i try to book in my organization. Below is the code snippet used. VEvent vevent = new VEvent(startDate, endDate,eventName); Location loc = new Location("Conference Room name"); vevent.getProperties().add(loc); Now the event created has only name of the conference room, but it is not blocking the Room. We have unique id for conference room, I need to set that as urn:uuid property . SCHEDULE-STATUS=1.2:urn:uuid:9121EBA7-6CD5-2FF8-F5BA-94E6E57C2A51 So , could you guys please help me to find the way to set this urn:uuid property in Location. Thanks and Regards, Pradeep Alabe