Interesting. I make a SFTP Server for Windows, actually the first release was this month. While my classic ftp stuff is still going strong, despite IIS being out for decades. I wonder if their implementation will be complete and what kind of niche space will still be avail. I'm a little worried about MS releasing something that crushes my effort, but in the past, they kind of derp out on these efforts. While the Windows Linux Subsystem is certainly cool, it's also quite crippled and feels quit isolated on the system.
Microsoft SSH server installs as a Windows System Service called "SshBroker" and "SshProxy"... you can check your system with "sc query | grep -i ssh" and then the subsequent detail query "sc query sshbroker".
I had no idea it was running, until one day I mistyped and typed "ssh devhost" vs "sftp devhost" and it logged in a shell. Was hoping to run console mode programs from it, like my beloved Semware Editor, but no dice. You can execute programs like "explorer" from the command line, there are no errors, but they don't seem to spawn on taskmgr.
Looking forward to finding out more about what you can do in Microsoft's SSH Server, my guess is "powershell" and command-line programs (gnu utils work great).