After a supplier invoice posted, you find the extension field in it greyed out. You are unable to edit the extension field any more.
Reproducing the Issue
- Go to Supplier Invoicing work center.
- Navigate to Invoices and Credit Memos view.
- Select a posted supplier invoice, open it.
- View all. you can see the extension fields greyed out, not editable.
You find the extension field of released customer invoice is editable, so you expect the same feature in the suppiler invoice.
However, the customer invoice and the supplier invoice are two different business objects and you should not expect a similarity between these objects.
Currently, once the supplier invoice being posted, all the fields, including the extension fields, are set to READ ONLY.
This is the expected system behaviour.
KBA , AP-SIP , Supplier Invoice Processing , How To