Hello otrs, just to improve debug, i suggest the following changes in Kernel/System/Auth/LDAP.pm the goal is just to log that the bind is successfull. # ldap connect and bind (maybe with SearchUserDN and SearchUserPw) my $LDAP = Net::LDAP->new($Self->{Host}, %{$Self->{Params}}) or die "$@"; if (!$LDAP->bind(dn => $Self->{SearchUserDN}, password => $Self->{SearchUserPw})) { $Self->{LogObject}->Log( Priority => 'error', Message => "First bind failed!", ); return; } elsif($Self->{Debug} > 0){ $Self->{LogObject}->Log( Priority => 'notice', Message => "Net:LDAP Successfully bind to the ldap server", ); } # build filter -- Best regards, Mathieu mailto:gollum123@free.fr