I would like to unapprove a couple of timesheet entries for my employee - however, the approver is currently not available. Do I need to wait till they get back or can an admin or manager unapprove a timesheet that has been approved by someone else?

I tried doing this but could not see the Unapprove button.

Anyone have any suggestion regarding how to get around this? What happens if an approver leaves the company and a timesheet needs to be unapproved and fixed?

Any 

Sudip