We have set 4 approvers to 1 service desk request and set only 1 approver to approve the request.
But strangely the other remaining 3 approvers cannot view those tickets in the Customer Portal by clicking the approval notification email after the first guy approved the ticket and showed "no access to the request"

Is there a way I can assist to set the other 3 approvers can view the ticket info within the Customer Portal even the first approver approved the ticket?
I do not suggest setting those 3 approvers to be "Service Desk Customers" or "Service Desk Team" roles for that Service Project.