Guest access in SMB2 will be disabled by default in Windows Server 2019.
According to microsoft (see:
https://support.microsoft.com/en-us/help/4046019/guest-access-in-smb2-disabled-by-default-in-windows-10-and-windows-ser
)
> In Windows 10, version 1709, Windows 10, version 1903, Windows Server, version
1709, Windows Server, version 1903, and Windows Server 2019, the SMB2 client
no
