How to restrict manual release of a "Qty Ord" hold and "Qty Recd" hold with out disabling the "Manua

 Hi,

My requirement is to send a customized FYI notification(no option to release the hold form notification) to the Requisition/PO approver and it could not be release by AP manager from Invoice workbench as well. 

my developer able to customize the notification without any option to release the hold from notification, 

but AP manager is able to release the hold manually as we have enabled the "Manual Release Allowed" check box in "Invoice Hold and Release" Names window as it is required to start the workflow,

 

How to restrict manual release of a "Qty Ord" hold and "Qty Recd" hold without disabling the "Manual Release Allowed" check box in "Invoice Hold and Release" Names window?