If you’ve ever tried to setup Dynamics AX posting profiles with the Contoso demo company as your guide, I’m sorry. They are not setup like a real company would configure AX.
In AX 2012 Trade, sample posting profiles are provided along with a “What’s This?” description of the more critical fields. Below are excerpts from the book to get you started on the right path.
Click to access dynamics-ax-2012-trade-inventory-management-item-groups.pdf
Joel Leichty 