Hi Lucas,
If you define a customer to use 'Formatted addresses', not only are the city and province saved distinctly, but they are also saved in a 'City, Province' format in a hidden 'address line 4' field. When an OE order is created for such a customer, the discrete City and Province fields are ignored, and instead Address line 3 in the bill-to and ship-to areas are populated with 'City, Province'. And Address line 4 instead, if all other address lines for the customer are non-blank.
There are different spec codes available for printing the address from the customer directly, or printing the bill-to or ship-to address from the OE document. You can use the 'All' sample spec to preview what prints for the various address field codes.
So indeed the addresses are linked as you say. OE just has some logic defined in how to read the addresses in a different way, until such time that Formatted addresses are directly supported on the OE documents.
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Regards,
Softrak Tech Support