If a customer has completed an order on your site using a credit card, their information is collected and stored by Authorize.net using CIM (Customer Information Manager) Profile.
1. Go to Store Administration > Orders > Create Order, click 'Search for an exisiting customer.'
2. To get started, you will need to look up their customer ID. To do this you will need either their first name, last name, or email address. Enter the information in the field provided, and click 'Search.'