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When you use a coupon for a promotional discount activity, it refers to a sales line instead of a sales order total.
The way coupons are implemented back in Microsoft Dynamics AX 2012 R3 version is that it always looks at the order line instead of the order, when no item qualification is defined.
The expectation is that, this to work at an order level instead of line when there are no item qualifiers. However, it is not designed that way.
STATUS DETAILS
Declined
Administrator on 2/4/2023 9:21:39 AM
In current Commerce pricing model, coupon is linked to and backed by discount, coupon adds additional validation on top of discount, it's the discount configuration that defines the actual qualification criteria and qualified items. - Boyce Zhu, Principal Product Manager for Dynamics 365 Commerce