The Windows 10 OpenSSH client allows you to connect to remote SSH servers directly from the Windows command line. The server allows remote users to to remotely connect to Windows 10 and receive a command prompt over SSH. While the Windows 10 client is really easy to install and use, figuring out how to get the server up and running was a real pain as you have to do a lot of undocumented changes to permissions & privileges and the key generation doesn’t work as expected. After the installation, two new Windows services called. and the associated files will be stored in the folder C:WindowsSystem32OpenSSH.
Source: https://www.bleepingcomputer.com/news/microsoft/how-to-install-the-built-in-windows-10-openssh-server/