ADFS WAP Proxy – An error occurred when attempting to establish a trust relationship with the federation service.

Environment

  • Windows 2012 R2 server on the LAN with the Active Directory Federation Service Role installed
  • Windows 2012 R2 server in the DMZ with the Remote Access role and the Web Application Proxy (WAP) feature installed

Problem

Getting the following error running the Web Application Proxy Configuration Wizard

“An error occurred when attempting to establish a trust relationship with the federation service. Error:  The request was aborted:  Could not create SSL/TLS secure channel”

Event ID 393 was written to the event log read more