customer Notifications

[demig-DonorDialogue]

Forum members:
I have created a notification event for ticket updates and I have included the 'Customer' recipient and I have selected all the States, Priorities and Queues. However, when changes to the state of the ticket are made, the email associated with the Customer are not getting the notification email that we have defined for the event. We have not put values in the CustomerID or CustomerUser fields.

Any ideas what we can do to get the event notifications to be sent to customers?