Yep, I am quacky, but when I can not explain it, then something else is afoot.
It is commonly referred to "Windows Remote Desktop Session Host Server SDK APIs"
Call it as you may, but everything, and I mean everything, from putting to approach shots is completely gone AWOL. So, I am a quack!!!!
So, yes, something is definitely wrong, and that DLL should never be present. Especially when I have RD and terminal services disabled at the software level, and GPO level.