Quote Originally Posted by tico View Post
I have a wholesale company and now I will be selling wholesale online. I want to use the same customer numbers that I have for my company software in ZC instead of ZC assigning new customer I.D. #’s. I tried uploading with Apsona but it did not work. Can anyone help please?
Add an additional field to customers for this purpose and let zen-cart do what its does best (with its ID numbers)

There seems to be at 2 least add-ons that might do what you want
"Additional Customers Fields" is one of them