Purchasing Policy - Account Category Matching Override.

Hi 

My AP Parameters are set to 3-way matching, with 'Require Approval', I have created a Purchasing Policy for a particular Procurement Category to not require matching.

When i create the PO, do the product receipt, and then generate the invoice, i add a line to the invoice with the procurement category mentioned above. But when i click 'Update Match Status' it still says Failed (and on the line 'Not Performed')

Is there something I am doing wrong?

(i posted this on the D365 forum, but nobody has replied)