The customer is using APP10 UPD 7. One of the Terminals is based in Vado, Italy and uses the Italian Global Extension functionalities.
Vado Gateway uses an external Billing system N4 from where customer invoices are issued. This is then integrated with IFS to bring the invoices in IFS as External Customer Invoice (Manual Customer Invoice).
The Terminal is requesting that the e-Invoice information to the Tax Authorities be sent from IFS to the Tax Authorities.
From the documentation we see that this is possible from Instant Invoice and maybe from Customer Order Invoices. Is it also possible to send the e-Invoice XML from Manual Customer Invoices?