I was annoyed that this was not possible, also, if you reply via email the notifications for that ticket will stop sending even though no one is assigned. So, I tackled this issue and have written a work around that will update and create a few lines...

I was able to write an SQL query that emails our IT Help Desk team when a ticket is assigned. I wrote it to have the TicketID, Time Opened, Time Assigned, Ticket Subject, User, Agent Assigned, Ticket State and Ticket Category. I have mine running eve...