How to change crm 2011 online session timeout?

(On the ADFS server?)Open a Windows PowerShell window with Administrative Rights.
PS > Add-PSSnapin Microsoft.Adfs.PowerShell
PS > Get-ADFSRelyingPartyTrust -Name:”relying_party“
PS > Set-ADFSRelyingPartyTrust -TargetName “your_relying_party_name” -TokenLifetime 7200
So this code set the session timeout as 12 Hours (7200 minutes )
Don’t forget to replace your_relying_party_name with the real name in your AD FS 2 Manager –>Relying Party Trusts

http://www.interactivewebs.com/blog/index.php/server-tips/your-session-in-microsoft-dynamics-crm-is-about-to-expire-crm-2011-extend-session-time/

http://www.isvlabs.com/2011/11/how-to-set-dynamics-crm-2011-ifd-session-timeout/