I've misplaced my Amazon Merchant ID used for the Nexternal Integration. How can I find this?
1) Login to your Amazon SellerCentral account and select "Settings/Account Info" from the menu.
2)Inside of the "Seller Information" panel there should be a URL for your Storefront.
3)Click the Storefront Link to display the storefront, then copy the entire URL out of the browser address bar and paste it into a text editor. The Merchant ID is the value at the very end of the URL. This is the value that you'll need to use in the Order Management System "Merchant ID" field.
For more information on Amazon configuration as it relates to Nexternal please visit the Amazon Integration Setup Guide: https://www.nexternal.com/documentation/Nexternal-Amazon-Integration-Setup-Guide.pdf