If you have installed Web Client Server on a computer with Windows Server 2008, Windows Vista or Windows 7 and use IIS 7, the Windows Authenticationand IIS 6 Management Compatibility components must also be installed on the computer.
To add these components, open Server Manager by going to Control Panel > Administrative Tools. There, navigate to Roles > Web Server (IIS). Then click Add Role Service and select the Windows Authentication and IIS 6 Management Compatibility components for installation.
