Is it possible to add an externally generated invoice to an existing order record?
The scenario is as follows: A company receives orders via a Magento 2.4 online shop.
The orders are further processed in an ERP system and the invoice is also generated there.
Now the company would like to make it accessible to the customer via his Magento account.
How could this kind of invoice upload be realized?
It is not doable out of the box but it is a pretty simple thing to custom develop.