Michael -
My understanding is that in order to create a PO, you need to select a vendor, not a customer. So, in order to do the proposed method, I would have to create a second instance of every customer as also a vendor? Or can you merge and link them in Method so you have one entry viewed as vendor OR customer which will then sync to Quickbooks? Also, when you custom set it to create a PO off a case, will it redirect to QuickBooks Online new PO record, or will it be a Purchase Order in Method that will then sync over to Quickbooks. I am concerned the solution may be directed more towards Quickbooks Desktop versus Quickbooks Online.
Emily