The default ticket priority for a new ticket created in Commerce Service Center is 0. The newTicketPriority value is set in the TicketingManager.properties file in the ACC.
To change the default priority for new tickets:
From the ACC menu, select Pages and Components > Components by Path. The Components page is displayed.
From the Components page, expand the atg > ticketing folder, and then double-click the
Ticketing Managerfile. The TicketingManager Component Editor is displayed.From the TicketingManager Component Editor, scroll to the
newTicketPriorityproperty.In the
newTicketPriorityproperty, change the priority number as required, and then click Save.

