Workflow for Sales Order

Hi guys,

In Ax 2012, there are workflow for PR and PO, but there is no workflow for SO. I tried to create one, created new workflow category, workflow type and all the elements, but then I realized there is no field for the status like DocumentState on PurchTable or RequisitionStatus on PurhReqTable.

Is it possible to create workflow for Sales Order?

Thanks & regards,