Hi list, we are on Mac OSX Lion server ( 10.7.4 ) and here is a snippet from our logfile /var/log/caldavd/access.log. We would like to know why first time we get a entry with the correct username, but second time a empty string for the same user? It's a little bit confusing, because we run a wallboard for monitoring the usage on our server and the 'top ten' users, but the empty string is not so nice ;) I removed the ip address and the UUID, but both has the same values in the original logfile. Is there a way to get this corrected? 127.0.0.1 - username [18/Mar/2013:14:21:47 +0200] "PROPFIND /principals/__uids__/the_UUID_of_the_user/ HTTP/1.1" 207 1366 "-" "Mac OS X/10.8.2 (12C3012) CalendarAgent/55" i=7 t=12.0 or=1 cached=1 xff=xx.xx.xx.xx fwd=xx.xx.xx.xx 127.0.0.1 - - [18/Mar/2013:14:22:21 +0200] "PROPFIND /principals/__uids__/the_same_UUID_as_in_the_entry_before/ HTTP/1.1" 401 141 "-" "Mac OS X/10.8.2 (12C3012) CalendarAgent/55" i=6 t=14.6 or=1 xff=xx.xx.xx.xx fwd=xx.xx.xx.xx Thanks, Sirko