I just followed the installation instructions and installed "Build Tools for Visual Studio 2019" including the "Windows 10 SDK and the English language pack components".
Unfortunately it seems that the resulting configuration DOES NOT include the Link.exe
Which of the other options must also be selected to actually get a VS environment that includes all that is needed?
It finally worked but I don't know which of the additional "Optional" packages finally made the difference..nor do I care.
I think it would be a good idea if the sketchy Rust installation instuctions were updated with regard to what actually needs to be selected here. I had finally selected the below (it is propably more than is needed but I did not want to waste more time with trial & error)..