You can use the Customers report to view the details of all the customers that got synced from Shopify to Zenoti.  The sync is irrespective of any sale order generated for a customer in Shopify.  

Important: If a customer does not exist in Zenoti, it is created with the details in Shopify, associated with the Shopify default center, and finally synced. The referral source for this customer is Shopify.

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