I added the fields "External ID" and "Display URL" to my Product object. They are visible for all profiles and not read-only. They are visible on the product layout, and shown when I do a "New Product."
However, I get the "Select ..." prompt in the Salesforce field column for these fields when doing a Products Import, and my fields aren't available as mappings. What have I done wrong?
Update: I thought I'd just try doing this again and see if it was something in my workflow, and it must have been. When I look at my new field (Marketing URL), it is a Product Custom Field with an API name. But the old field just shows as a Product Field with no API name. What step did I do incorrectly the first time?