Depending on the version of .NET Framework that you use, you might encounter configuration errors when you try to open Customer Portal. To avoid this error, you need to verify that the application pool will use ASP.NET v4.0.
- Choose Start > Administrative Tools > Internet Information Services (IIS) Manager.
- On the Internet Information Services (IIS) Manager console, in the left pane, expand your server name, and then expand the Sites node.
- Find and right-click the CustomerPortal site. Choose Manage Application > Advanced Settings.
- On the Advanced Settings window, choose the Application Pool lookup icon.
- On the Select Application Pool window, in the Application pool field, select ASP.NET v4.0.
- Choose OK.
- In the Advanced Settings window, choose OK.