title: How to reset a FormsAuthentication.RenewTicketIfOld Expiration and Issue Date?
body: <p>So I'm trying to reset a <code>FormsAuthentication</code> cookie's <strong>Expiration</strong> and <strong>Issue Date</strong> using the <code>RenewTicketIfOld</code> method and it's incrementing the expiration date to an additional 30 minutes from the issue date. </p>
  
  <p>Is it possible possible to change that to just 20 minutes? Or any advice on this matter? </p>
  
  <p>Thanks!!</p>