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In the standard payment connector in D365 with Adyen, we get a random GUID generated for both shopperReference and MerchantReference against the transactions logged in Adyen PSP Portal.

ShopperReference is a field in Adyen to uniquely identify a customer, so this should be the same as Customer Account Number in ERP.

MerchantReference should be Order number for Payment Authorization, Invoice ID for Payment Capture and Credit note invoice number for Refunds.

This will help a lot the business and enterprise customers to identify and reconcile transactions from PSP backend with ERP system.
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