Hello, I have recently installed calendarserver 1.2 on Debian lenny, client software being ical 3.0.8 running on Leopard. I have created two users in accounts.xml, as well as a group account that includes both of them. The SSL setup in caldavd.plist was a breeze. I kept an "empty" sudoers.plist, as I am not sure that I need that feature. Both individual users are happy campers: they can create calendars, add events, remove events. However, none of them seem to be able to interact with the other one. The kind of interaction I have been trying is delegation: ical preferences > accounts > delegation > edit > + > type "user1" > done leads to "cannot enable access to your account. "user1" was not found"". Same sort of problem when I create a new event, click on "add attendees", type "user1" and end up with an exclamation mark close to "user1". On the server side, the error.log looks like this: 2009-08-09 09:25:24+0200 [-] [caldav-8443] [-] "No principal for calendar user address: 'invalid:nomail'" 2009-08-09 09:25:24+0200 [-] [caldav-8443] [-] 'No schedulable principal for calendar user address: invalid:nomail' 2009-08-09 09:25:24+0200 [-] [caldav-8443] [-] 'Error during POST for invalid:nomail: None' Any specific place I should be looking at? Thanks for any comment/suggestion sudoers.plist: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd "> <plist version="1.0"> <dict> <key>users</key> <array> </array> </dict> </plist> Anonymized accounts.xml: <?xml version="1.0" encoding="utf-8"?> <!DOCTYPE accounts SYSTEM "accounts.dtd"> <accounts realm="TheRealm"> <user> <uid>user1</uid> <password>user1password</password> <name>User1</name> <cuaddr>mailto:user1@example.com</cuaddr> </user> <user> <uid>user2</uid> <password>user2password</password> <name>User2</name> <cuaddr>mailto:user2@example.com</cuaddr> </user> <group> <uid>both</uid> <password>bothpassword</password> <name>BothofThem</name> <members> <member type="users">user1</member> <member type="users">user2</member> </members> </group> </accounts> Directory service in my caldavd.plist: <key>DirectoryService</key> <dict> <key>type</key> <string>twistedcaldav.directory.xmlfile.XMLDirectoryService</ string> <key>params</key> <dict> <key>xmlFile</key> <string>/etc/caldavd/accounts.xml</string> </dict> </dict>