You might want to use workflow to control purchase orders for a specific amount. If you have workflow turned on for all orders then it might get a little tedious for the organization. So in this example let’s have a look at setting up a purchase order workflow that will auto approve if the order is below $5000 else it will go to someone for approval.
Here is a quick look.
AX2012 R3 CU9
Whiled I used CU9 in this example this process is the same in any AX2012 release.