Windows Server 2019 officially supports OpenSSH
OpenSSH is a client-side and server-side software tool that supports remote login, remote file transfer, and public/private key management. OpenSSH was originally part of the OpenBSD project and has been used for many years on BSD, Linux, MacOS, and Unix. The Open SSH client is currently available as an add-on feature in Windows Server 2019 and Windows 10 1809.
The 32-bit version of OpenSSH was originally included as a pre-release feature in Windows 10 Fall Creators Update and Windows Server 1709. In the Windows 10 1803 release, OpenSSH has been released as an add-on feature on demand. However, it has not been released in the current version of Windows Server.
Adding OpenSSH to Windows Server 2019 will facilitate the use of unified standards for remote server management between systems. For more information on OpenSSH, please visit the Win32-OpenSSH wiki and Microsoft documentation.