@Dominic B i found a hack way to do this that is not as efficient, but has value in some basic cases. If you use the import process (and perhaps bulk page) for loading fulfillments, the system will fulfill the SO and associated PO as well. However, this process is all or nothing, so for us the line level location is key. We will likely need to switch to having our drop ship POs listed as a separate location so that we don't accidentally fulfill items from our normal location at the same time. of course if you have multiple drop ship items on the same order, then you still have the same issue if they share the same location but are for different vendors. so this is only helpful in basic orders.