Hi, I was trying to customize the visibility of the Service dropdown during the creation of a ticket in the Customer web interface. I need to hide/unhide some entry based on the request type selected. I put the following lines in Kernel/Config.pm, but nothing changed. # ticket acl $Self->{TicketAcl}->{'Nascondi-Servizi-Coda-001'} = { # match properties Properties => { # current user match properties Ticket => { Type => ['Acquisizione dati'] } }, # remove options (black list) PossibleNot => { # possible ticket options (black list) Ticket => { Service => ['Hardware'] }, }, }; Could please give me some hints or tell me where can I found a good documentation on ACLs? Thanks Gianni