The Multi-Factor Authentication Server must be installed on the Internet Information Server (IIS) box that hosts the website ...

The Multi-Factor Authentication Server must be installed on the Internet Information Server (IIS) box that hosts the website you want to add Multi-Factor Authentication to.  The website must authenticate to the Windows domain and may be set up to use form-based authentication (login form) or HTTP authentication (basic or interactive).  Please select the appropriate option based on your website's configuration.