Portal Time Out

Hi ,

I need to set the time out of EP 7.0 to 20 minutes. we dont have any sso to ecc etc.

We are having portal with KM iviews and java webdynpro.

I want the user session to expire after 20 minutes if he dont do any work in portal that means idle time out. Example like getting the logon page again or giving a message like session time out please login.

Thanking You

Hasni