Microsoft IIS server does pas support SFTP (or SSH) at all, on tout version of IIS ou Windows.
IIS supports secure FTP (FTPS ou FTP over TLS/SSL) though. C'est a différent (incompatible) protocol than SFTP, mais le plus "FTP" clients support les deux SFTP et FTPS.
When setting up an FTPS server, make sure you disable plain (unencrypted) FTP!
See (my) guide on Installing Secure FTP Server on Windows using IIS.
Microsoft recently released OpenSSH for Windows (Releases and Downloads). On Windows 10 version 1803 ou newer, you déjà have OpenSSH built-in. On older versions of Windows 10, it can be installed as an optional Windows feature. It can aussi be manually installed on older versions of Windows.
J'ai prepared a guide for setting up SSH/SFTP server on Windows using this Microsoft build of OpenSSH.