Drive the Liability from the Accounted Subledger Item Expense Account

I need to be able to drive my liability company code from the Company code derived from subledger accounting.

The subledger accounting uses Project based rule to derive the company code from the Task Organization (via a mapping).

I need to replicate the same in the AP liability account. Input is appreciated.

Esmeralda

Note, I am cross posting to Project Management as well.