We have business customers that place multiple orders with different PO numbers. The ability for us to include the PO number on the shipping label allows our customers to identify which boxes belong together. I would like to be able to import PO numbers and other custom fields into Shipstation.
I am aware that the documentation states that this is a support activated feature, however despite having it activated, the PO numbers are not importing. After further escalation by support they have confirmed that import of custom fields such as PO Number is only supported in Magento 1.
Magento 2 was released back in 2015 and this vital feature has not been implemented.