I got it working as a workaround by replacing the mstscax.dll (Version 10.0.14393.0) in %windir%\SysWOW64\ with the “backup file” in “Windows.old\WINDOWS\SysWOW64” version (10.0.10586.494)
I had to take ownership of the file and give Administrators Full control access to be able to replace the file.
Hope this helps someone out.
Be aware this is an extremely temporary fix. The next feature release will replace that dll for sure. If there is a security update to RDP, this will also replace the dll. So be prepared for it to not stick.
I’m still trying to work with the Essentials team to get this understood to see what our long term options are.