We are on Magento 2.1.5.
We would like to exclude products we have already discounted and assigned to our Clearance rack category from being included in a cart coupon discount promotion.
Anyone know how we set in the cart discount rules so a category of products is not allowed to have the Coupon discount applied?( or "is Excluded")
You should use condition:
Category 'is not' or 'is not one of' like here -