RT 3.8.7 I must be misunderstanding something, because as I see it, it appears that defining a validation regexp for a Custom Field causes that Custom Field to be non-optional.
Name: Occurred Date Applies to: Tickets Type: Enter multiple values Validate: (?#YYYY-MM-DD)^\d\d\d\d-\d\d-\d\d$ Creating a new ticket via the web GUI is rejected with: Occurred Date: Input must match [YYYY-MM-DD] What am I doing wrong? We don't want this field to be required. *IF* it is set to something, it must match that regexp. Discover RT's hidden secrets with RT Essentials from O'Reilly Media. Buy a copy at http://rtbook.bestpractical.com