In the intercompany inbox you can 'accept' an incomming invoice and 'complete line action...' and then it will be created as a Purchase Invoice, that you can work with and eventually Post.

My issue is that BC checks for accounts and correct dimensions when i click 'complete line action...'.
This means that:
- If the sending partner did not select an IC Partner Reference, you get an error. But in my case the sender did not know how her foreign sister company books this kind of cost.
- If the sending partner did not select an IC Dimension for a line where the receivings partner G/L Account requires a dimension, you get an error.

In my opinion it should just create a Purchase Invoice with a blank Account no. or missing dimension for the line. It's much easier to handle these errors in the Purchase Invoice view than under details of the transaction in the IC inbox.
If the information is still missing when clicking post, the normal check will stop the posting.