Intel Compiler 19.0 Initial Release C++17 support with Visual Studio 2017

I'm currently evaluating the possibility to move from C++11 to C++17. I currently use VS 2017 and Intel Compiler 19.0.0 (Initial Release), and I got two questions:

⚫ Q1: Does IC 19.0.0 supports C++17 with VS 15.7 or older versions?

I checked the Visual Studio 2017 support article [1] and it says the following regarding VS 2017, IC 19.0.0 and C++17:

Microsoft Visual Studio 2017 version | Supported Intel Compiler Version
-------------------------------------|----------------------------------------------
15.8                                 | 19.0 but without the additional C++17 support
15.7                                 | 19.0
15.6, 15.5, 15.4                     | 19.0 Initial Release

[1]: https://software.intel.com/en-us/articles/intel-compilers-integration-su...

There is no note on C++17 support with VS 15.4 to 15.7, but there is an explicit note on the lack of support with 15.8, This gives me the impression that IC 19.0 would support C++17 on these older VS versions. I tried searching the FAQs, Release Notes and documentation as well as this forum, but I could not find any piece of information to confirm if C++17 is supported or not with those older VS 2017 minor versions.

Does anyone here knows if IC 19.0.0 supports compiling code in C++17 mode when used with VS 2017 minor versions 15.7 or older?

⚫ Q2: How can I tell compilervars.bat which VS 2017 toolset (minor version) it should use?

My VS 2017 install (15.9.19) has multiple VC toolsets (found in the VC\Tools\MSVC directory):

VC Toolset | `_MSC_VER` | VS 2017 version
-----------|------------|----------------
   14.13   |    1913    |      15.6
   14.14   |    1914    |      15.7
   14.16   |    1916    |      15.9

When calling compilervars.bat to set up the development environment, I couldn't find a way to tell it which VS 2017 toolset it should use. By compiling a simple program which outputs the _MSC_VER, it seems to be getting the latest one (VC 14.16, VS 15.9):

// version.cpp
#include <iostream>
int main() {
    std::cout << _MSC_VER << '\n';
}

> "C:\Program Files (x86)\IntelSWTools\compilers_and_libraries\windows\bin\compilervars.bat" intel64 vs2017
> icl.exe version.cpp
> version.exe
1916

Assuming that ICC 19.0.0 would support C++17 mode with VS 2017 15.7 or older, I would need to find a way to make compilervars.bat use another toolset version (e.g.: VC 14.13, VS 15.6). 

Is there any way to tell compilervars.bat which VS 2017 toolset (minor version) it should use among the ones installed?