Domain Controller Blocked: NTLM authentication to this domain controller is blocked. Secure Channel name: %1 User name: %2 ...

Domain Controller Blocked: NTLM authentication to this domain controller is blocked.
Secure Channel name: %1
User name: %2
Domain name: %3
Workstation name: %4
Secure Channel type: %5

NTLM authentication within the domain %3 is blocked.

If you want to allow NTLM authentication requests in the domain %3, set the security policy Network Security: Restrict NTLM: NTLM authentication in this domain to Disabled.

If you want to allow NTLM authentication requests only to specific servers in the domain %3, set the security policy Network Security: Restrict NTLM: NTLM authentication in this domain to Deny for domain servers or Deny domain accounts to domain servers, and then set the security policy Network Security: Restrict NTLM: Add server exceptions in this domain to define a list of servers in this domain as an exception to use NTLM authentication.