If I'm forwarding a ticket to a third party and this this party replies, a private note is added to the ticket.
I seem to have no way to know if this happens.
I want to create a rule that sets the priority of such tickets as Urgent.
When I try this, there's no way to say "..and the events are NOT performed by", so I can't make a rule modifies these tickets, because it would also modify the tickets I personally adds a private note to.
Any suggestion here?