Description : User would like to add a promotion to an existing Sales Order but promo code is not being accepted. Promotion is still being accepted for similar newer Sales Orders.
Solution
1.Navigate to Lists > Marketing > Promotions
2.<Promotion to apply: Click Edit
3.Scheduling:
Note: Sales Order’s creation date should be within the Promotion Code’s start and end date.
- Update Start Date and End Date
4.Click Save