I have one SKU I would like to exclude from all my price rules, so none of the price rules can be used on this specific SKU. But I have no idea how to do it. Can you please help?
First go to Product Attributes and select SKU attribute and enable option: "Use for Promo Rule Conditions" /this is for Magento 2, for Magento 1 should be the same or with the same meaning./, then save the attribute. Go to Catalog Price rules, open your rule and go to Conditions section: Click the green button,select from dropdown the SKU. Make SKU is not and enter the sku of the product