The DualShield IIS Agent must be installed on the IIS server that is to be secured with multi-factor authentication.
Before installing the DualShield IIS Agent, you must exit the IIS Manager if it is running.
On a Windows 2008 server, launch the installer “SetupDualIIS7_x64.xxx.yyyy.exe” (where xxx is the version number and yyyy the build number) and complete the following steps.
On a Windows 2012 server or later, launch the installer “SetupDualIIS7_x64.xxx.yyyy-dotnet4.exe” (where xxx is the version number and yyyy the build number) and complete the following steps.