Question : How to cancel approved leave from employee ESS login?

Answer : An approved leave can also be cancelled by the employee. Employee needs to go to Self Service Menu -> Leave. Here select the month first, which will show all approved leaves in that month. 

From above page click on 'Mark Leave Cancellation' icon shown as 'X'. Now on next pop-up put a reason/remark for Leave Cancellation and Save the request.

Once Manager approves your Leave Cancellation request, your approved leave will be deleted and balance will credit back to your account.