After disabling SMBv1, a new active directory authentication server will be unable to join the domain. The following error message will occur in the event log:
2017-06-13 08:25:54 - ive - [127.0.0.1] System() - Active Directory authentication server 'AD':
Samba error message: '...Failed to join domain: failed to find DC for domain XXX.XX.XXX.XXX ...'
For customer using Active Directory Legacy Mode, the following error message will occur after clicking the Test Connection
Either the server is not a domain controller of the domain or the Netbios name of the domain is
different from the active directory (LDAP) name.
For existing customer which have already configured an Active Directory server, end users will face authentication issues and WINBIND will fail to join the domain. The following entry will appear in a policy trace:
2017/05/14 06:54:59 - Winbind Authentication status -1073741730(NT_STATUS_NO_LOGON_SERVERS)
for user XXXX
In a tcpdump taken from the internal port, the SMB negotiate protocol request will state NT LM 0.12.