This policy setting turns on or turns off an HTTP listener created for backward compatibility purposes in the Windows Remote Management (WinRM) service. If you enable this policy setting the HTTP listener always appears. If you disable or do not configure this policy setting the HTTP listener never appears. When certain port 80 listeners are migrated to WinRM 2. 0 the listener port number changes to 5985. A listener might be automatically created on port 80 to ensure backward compatibility.