is it supported in McAfee Web Gateway / can we use SMBv2 for NTLM AD Host Authentication ?
The version in beta currently supports it, but 7.7.2 or lower does not.
Healthy alternatives would be to configure Kerberos with LDAP group lookups. See this guide for configuring Kerberos:
Also please refer below link for more info:-
SMB2 support is implemented in MWG 7.8