Sliding sessions in TMG?

Hi,

Is it possible to configure sliding sessions in TMG?I found that it is possible in .Net framework with the “SlidingExpiration” property but is this configurable in TMG?

https://msdn.microsoft.com/en-us/library/system.web.security.formsauthentication.slidingexpiration(v=vs.110).aspx

Regards,

Johan