Hi list Following example 9-7 at http://doc.otrs.org/2.1/en/html/x1456.html , trying to authenticate agents against active directory gives this error. Can't modify not in scalar assignment at /.../Kernel/Config.pm line 93, near "'Kernel::System::Auth::LDAP';" Net::LDAP is installed Any help will be very much appreciated. Regards Kobus The additions to Config.pm was: $Self->{'AuthModule'} = 'Kernel::System::Auth::LDAP'; # <-line 93 $Self->{'AuthModule::LDAP::Host'} = 'myserver.mydomain.co.za'; $Self->{'AuthModule::LDAP::BaseDN'} = 'dc=mydomain,dc=co,dc=za'; $Self->{'AuthModule::LDAP::UID'} = 'sAMAccountName'; $Self->{'AuthModule::LDAP::GroupDN'} = 'cn=OTRS-Agents,ou=Groups,ou=Unitname,dc=mydomain,dc=co,dc=za'; $Self->{'AuthModule::LDAP::AccessAttr'} = 'memberUid'; $Self->{'AuthModule::LDAP::SearchUserDN'} = 'otrs'; $Self->{'AuthModule::LDAP::SearchUserPw'} = 'xxxxxx'; $Self->{'AuthModule::LDAP::Params'} = { port => 389, timeout => 120, async => 0, version => 3, };