Is this process still required to enable smart card for Edge on 1912CU6/2016 Server? I ask because i deploy the sfrhook via GPO. When I updated one of my dev boxes from 1912 CU3 to CU6, I was getting a gray screen on launch with a 1005 CtxUvi error in the event log. A subquent reboot allowed the desktop to launch normally. I'm assuming the gray screen was due to the sfrhook key being written to the registry after the VDA was upgraded. https://support.citrix.com/article/CTX296999/unable-to-use-smartcard-in-microsoft-edge-chromium-on-server-2016