By using the function Send via e-mail, in the window functions in the Print Invoices procedure, the supplier can send an invoice* to the customer as an attached XML file in an e-mail message. The default setting is to attach an XML file to the e-mail message along with the PDF file of the invoice that is always sent. This is configured under the button Attach XML file under the Info tab in the Update Customer procedure.
* This also applies to prior (old) invoices from the Reprint Prior Invoices procedure and interest invoices from the Print Interest Invoices procedure.