The Planning Server Administration Console provides a number of useful controls and settings that administrators can use to setup and maintain their organization’s applications, model sites, system settings and data connections. However there are a number of settings that are not accessible via the Administration Console. In some cases the only way for an admin to access these settings is via the Web.config file. By default the Web.config file is installed on the PerformancePoint Planning Server at C:\PerformancePointTemp\3.0\WebService.
The Web.config file contains runtime settings for ASP.NET and determines how application requests are processed – in this case, Planning Server application requests. You can manage the Planning Process service and also the session settings in the Administration Console using the Web.config file. The Session settings topic in the Microsoft TechNet library illustrates a specific workaround solution using the Web.config file. And the httpRuntime Element (ASP.NET Settings Schema) topic in the Microsoft MSDN library contains all of the attributes and elements within the Web.config file.