I want Email notification to be sent to PO Requester instead of PO Creator for the start and end of the workflow

Hello All,

I have a requirement where PO Requester needs to be notified through email that a PO has been created on their behalf. 

Out of the box, system only seems to be sending notifications to workflow creator i.e. Orderer. 

Is there a way to meet the above requirement?

Thanks,

MJ