Does Manual Input of Invoice Due Date Automatically Generate a Discount?

 We have an external system that feeds voucher transactions into JDE E1 8.12.  The voucher feed populates the Invoice Due Date.  We have found that JDE will calculate and take payment discounts no matter what date is entered if the vendor has terms that include a prompt payment discount.  If the payment due date is populated rather than JDE calculating the due date, will the system automatically take the discount?  We entered invoice due dates going back two years and the system calculated and applied the discount.