Session settings at profile level – Winter 15 update
Now you can manage session timeout at the profile level. Salesforce has provided this option in their winter 15 release. Earlier (before winter 15) we had only option to set this change at organization level. But in winter 15, you can manage session timeout at the profile level. profile level changes override the organization session settings. Until you set this on a profile, the organization-wide Timeout value in the settings applies to users of the profile. Once set, the this on a profile overrides the organization-wide Timeout value for users of that profile. Changes to the organization-wide Timeout value will not apply to users of a profile with its own Session Timeout value.
Where we can find these settings at the organization level? To find these settings at org level go to setup ->Administer-> Security controls. here you will find a timeout option. See the below screen for reference.
Where we can find these settings at the profile level?
Go to setup -> Administer-> Manage Users -> profile -> edit -> go to session settings & change timeout value for profile. see below screen for reference.
This option will really helpful for administrators to manage session settings at the profile level.