Siebel System Administration Guide > Configuring the Browser for Siebel Web Clients >
Manual Security Settings for High Interactivity
If you are not using supported security setting templates for applicable Web content zones for your Siebel high-interactivity applications, then you must manually specify the Internet Explorer settings described in this section. (Some settings are not associated with either Low or Medium-low security templates. All such settings are optional.)
See also General Requirements for High-Interactivity Deployments and following sections.