I have a server built from SVN running on debian etch (with python 2.5 from sid). It's configured to use XMLDirectoryService. Client software is iCal 3.0.3 (1244) on 10.5.3. Although users can log in and edit their own calendars, free/busy doesn't work ("Availability is not supported on the server for this account) and delegates for resources don't work ("Delegation is not supported on the server for this account". Also following instructions I've found in the archives I'm unable to set up iCal to access shared calendars ("Access is denied at https://<server>:8443/ calendars/groups/<group>/calendar with this login and password."), although I'm not positive that iCal is supposed to be able to do this anyway as the documentation is lacking (as has been discussed on this list). The cert is self-signed, but the CA is imported into the keychain and it works fine in Safari and Mail.app so I don't think it's an https problem, and I have the same issue with http anyway. I do get this message in the error_log: 2008-06-12 12:02:05-0400 [-] [caldav-8009] [AMP,client] [twisted.web2.dav.resource#info] Authentication failed: Incorrect credentials for < XMLDirectoryRecord [users@55a7b2a7-2238-57a0-8539-652e8aad9fdf(Calendar)] bf6c39d3-5267-5bfc-8df1-39d7d1591e80(ed) 'Ed Poe'> Is this just a subtle syntax error in my accounts.xml file, or is something else going on? I've tried deleting data files on the server (both the sqlite data and the contents of the CalendarServer/Documents directory). If I use a web browser I can see that the principals all exist. <accounts realm="Calendar"> <user> <guid>f1f8ce95-2482-5c41-9c47-952ec8394056</guid> <uid>admin</uid> <password>XXXX</password> <name>Super User</name> <cuaddr>mailto:root@mydomain</cuaddr> </user> <user> <uid>ed</uid> <guid>bf6c39d3-5267-5bfc-8df1-39d7d1591e80</guid> <password>XXXX</password> <name>Ed Poe</name> <cuaddr>mailto:nobody@nowhere.int</cuaddr> </user> <user> <uid>kate</uid> <guid>673a4166-e05b-5908-8066-60756837fe74</guid> <password>XXXX</password> <name>her name</name> <cuaddr>mailto:nobody@nowhere.int</cuaddr> </user> <group> <uid>groupname</uid> <guid>1b8539c4-074f-5bd2-ba3d-963049bfb044</guid> <password>XXXX</password> <name>our group</name> <members> <member type="users">ed</member> <member type="users">kate</member> </members> </group> <resource> <uid>car</uid> <guid>a8b27dba-8cf6-513e-a7cf-b940ffed94fe</guid> <password>XXXX</password> <name>Honda del Sol VTEC</name> <auto-schedule/> <proxies> <member type="users">ed</member> <member type="users">kate</member> </proxies> </resource> </accounts>