All you need to know about Windows SMB signing

The first version, referred to as SMB1 signing, applies to Windows 98, Windows NT 4.0, Windows 2000, and Windows 2003 servers. The second version, called SMB2 signing, was introduced for Windows Vista and Windows Server 2008 and beyond. We’ll see how to configure in each of these versions.

Windows 2008 VPS via All you need to know about Windows SMB signing.