I have a requirement to trigger a workflow when ever a certain field gets change in Purchase Order.
Only after the Approver review the change and approves it then actual change should happend. Till that time it should not allow any other user to
change the PO.
I can trigger the Workflow when PO gets change, But I am stuck to lock the PO for the time until changes are not approved.
Please suggest me how we can achive this.