Hi there I installed DCS with your instructions and after some fiddling it installed fine. I can access the server through the webinterface and browse through the DCS collections. However, when I try to add the caldav server in iCal I get this message: "Account information not found. Request encountered an unexpected error (domain (null) / code 0).". The run log file shows this: 2008-02-11 17:48:44+0100 [-] [caldav-8008] [HTTPChannel,0,10.0.0.105] PROPFIND /calendars/users/admin/calendar/ HTTP/1.1 2008-02-11 17:48:45+0100 [-] [caldav-8008] [HTTPChannel,1,10.0.0.105] PROPFIND /calendars/users/admin/calendar/ HTTP/1.1 2008-02-11 17:48:45+0100 [-] [caldav-8008] [HTTPChannel,1,10.0.0.105] "Directory service <SudoDirectoryService 'Test Realm': FilePath('/opt/CalendarServer/conf/sudoers.plist')> has no GUID; generating service GUID from realm name." When I try adding the account a second time (without restarting the service) I just get: 2008-02-11 17:50:08+0100 [-] [caldav-8008] [HTTPChannel,2,10.0.0.105] PROPFIND /calendars/users/admin/calendar/ HTTP/1.1 2008-02-11 17:50:08+0100 [-] [caldav-8008] [HTTPChannel,3,10.0.0.105] PROPFIND /calendars/users/admin/calendar/ HTTP/1.1 Any idea what could be wrong here? And one more question, what's the advantage of running DCS over a generic caldav server such as DAViCal? Thanks tomcal