share level can use subauth by supplying 
NtLmAuthenticateMessage->ParameterControl with MSV1_0_SUBAUTHENTICATION_FLAGS 

new way of subauth (instead of MSV1_0_LM20_LOGON)

struct _MSV1_0_SUBAUTH_LOGON{
    MSV1_0_LOGON_SUBMIT_TYPE MessageType;
    UNICODE_STRING LogonDomainName;
    UNICODE_STRING UserName;
    UNICODE_STRING Workstation;
    UCHAR ChallengeToClient[MSV1_0_CHALLENGE_LENGTH];
    STRING AuthenticationInfo1;
    STRING AuthenticationInfo2;
    ULONG ParameterControl;
    ULONG SubAuthPackageId;
} MSV1_0_SUBAUTH_LOGON, * PMSV1_0_SUBAUTH_LOGON;