Well, what you are describing is the "cross company" posting procedure, which I believe has nothing to do with real "intercompany data processing".
What is needed is a solution which posts an outgoing Invoice (Intercompany AR) against a revenue account in one company code and also an incoming invoice (cost against Intercompany AP), and not going through a clearing account which in fact will never settle...
I am looking for a solution here as well. I know that this can theoretically done via a real sales order which triggers billing and then an idoc which is automatically posted against a PO in the other entity... but I am looking for something which would work for manual FI invoices.
Appreciate any help here.
Br
joerg