It would be great to use a custom field for Amazon order numbers to use with Amazon Shipping. In our case we import a different order ID into ShipStation and cannot take advantage of Amazon Shipping to purchase labels. We already import the Amazon Order Number into a custom field, so having the option of selecting where that order ID in the settings, would be awesome. Please consider this for a future feature, it would be a simple implementation and valuable.
Use Custom Filed for Amazon Orders for Amazon Shipping
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