Do I have to register my protective order in Utah in order to get it enforced?
Utah state law gives full protection to an out-of-state protective order as long as you can show the officer a copy of the order and can truthfully tell the officer that you believe the order is still in effect, or the officer otherwise believes that a valid (real) order exists.1 It does not have to be entered into the state or federal registry in order to be enforced by a Utah police officer, but the officer does need to believe that it is a valid order.
1 UT ST § 78B-7-304(4)