We need to post Customers Invoices and Vendor Invoices in SAP S/4HANA from external system and we are trying to use the Standard API “Journal Entry - Post (synchronized)” in order to do that.
Unfortunately we was not able to find the field "Document Number" in the API documentation. Since the number range related to finance documents allows an external numbering, this field should be present in the standard API.
Could you please tell us where we can find it?
Thanks a lot,