Is it possible to store multiple tracking numbers received on an inbound EDI 856 document?

Summary:

Is there a field or fields to store multiple tracking numbers received on an inbound 856 document? We currently place the tracking number in the packing slip field. Some of our vendors submit more than one tracking number per purchase order. If there is more than one, they are appended and placed in the packing slip field. Sometimes, the packing slip field is too short for all the tracking numbers and our integration will fail due to field length. Is there another solution for this?

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