Any Supported Microsoft Windows client or server operating system and Web Browser
The root cause of the issue is likely that the browser is losing session cookie information. This causes the browser to lose its link reference to the HTTP session object on the server, so whenever your application remains idle for too long, a new HTTP session object must be created which does not have any login information (so then it forces a new logon).
To mitigate this issue block all cookies in your web browser. With cookies blocked in the web browser client, as per the design of the Notification Manager website application, the server will then pass the value of the HTTP session reference object as an HTTP request parameter by a technique called URL Rewriting. This way the link between the HTTP request, and the previously established HTTP session object, will remain preserved for up to 30 minutes of inactivity in your IE browser session. After a long period of inactivity, a new logon will no longer be needed.