MFA authentication for published applications with Microsoft RD Web Access Server

How to deploy MFA authentication for applications published with Microsoft RD Web Access Server by using ADFS SecureMFA OTP Provider. Deployment steps used in a video can be found at the link: https://www.securemfa.com/knowledge-b...
Video shows deployment steps how Microsoft RD Web Access server can be linked to ADFS service for MFA authentication to Microsoft remote desktop services published applications or desktops. Free provider version (which runs for limited number of 24 users) can be downloaded from www.securemfa.com
This deployment allows to use Windows authentication and OTP tokens to provide MFA access for published RDP applications via Microsoft RD Web Access server.
Each connection is first pre-authorized by the ADFS and, if successful, the session is authenticated and authorized on the RD Web Access server itself.
All components of the MFA-OTP provider are hosted on-premise infrastructure and do not depend on 3rd party services in the cloud.