We have just set up a 20% discount for some partners by putting their accounts into a customer group and setting the discount eligibility to that group only.
However, when the discount is enabled, all customers are able to add the discount to their cart when they enter the discount code at checkout. This is something we want to avoid as we only want our chosen partners to be able to claim the discount.
Has anyone run into this issue before or is there something we are doing wrong?
Any help with the issue would be much appreciated!