Before sending your first actual OIOubl bills to a customer, it would be a good idea to send a test invoice from your test account.
However, you can avoid sending an invoice to a real consumer by using this test GLN number 2398472394870.
Despite seeming like a regular number, it is forwarded to no one, and you can see the results on your Sproom account
How to check , validate you OIOubl file
From the Sproom page download the XML, (not from Business Central)
upload to the link below.
If errors, sent to your Business Central partner, they will help you
