How to update email template in MS Dynamics NAV 2009?



I am using MS Dynamics NAV 2009 classic client. Our client has implemented nav approval management for sales and purchase. I had to update the email notification template to send email. I need to update for document link in the email.

I checked the 440 Codeunit Approval Notification but %5 field responsible forURL is blank.

I want to add url for direct opening of documents from email in classic client.

Thanks in advance.