This controls whether the client is allowed or required to use SMB1 and SMB2 signing. Possible values are auto, mandatory and disabled. When set to auto, SMB1 signing is offered, but not enforced. When set to mandatory, SMB1 signing is required and if set to disabled, SMB signing is not offered either. For the SMB2 protocol, by design, signing cannot be disabled. In the case where SMB2 is negotiated, if this parameter is set to disabled, it will be treated as auto. Setting it to mandatory will still require SMB2 clients to use signing. Disabled