The customer card within Commerce365 extends the original Business Central customer card. Go to Sales > Customers to see all customers that are currently entitled to use your web store. To add existing customers to this list, go to your standard customer list, open a customer card, and click Process > Create Web Customer.
A notification will be shown to inform you that you can now complete the customer account and send an invitation email.
Allowing new customer to register
Besides sending invites to existing customers you can also allow new customers to register through your webstore. There are multiple ways to collect the new account information, but by default new account data is imported into Business Central when a new customer places a first sales order.