Network security: Restrict NTLM: Audit NTLM authentication in this domain

Network security: Restrict NTLM: Audit NTLM authentication in this domain

This policy setting allows you to audit NTLM authentication in a domain from this domain controller.

If you select "Disable" or do not configure this policy setting, the domain controller will not log events for NTLM authentication in this domain.

If you select "Enable for domain accounts to domain servers," the domain controller will log events for NTLM authentication logon attempts for domain accounts to domain servers when NTLM authentication would be denied because "Deny for domain accounts to domain servers" is selected in the "Network security: Restrict NTLM: NTLM authentication in this domain" policy setting.

If you select "Enable for domain accounts," the domain controller will log events for NTLM authentication logon attempts that use domain accounts when NTLM authentication would be denied because "Deny for domain accounts" is selected in the "Network security: Restrict NTLM: NTLM authentication in this domain" policy setting.

If you select "Enable for domain servers" the domain controller will log events for NTLM authentication requests to all servers in the domain when NTLM authentication would be denied because "Deny for domain servers" is selected in the "Network security: Restrict NTLM: NTLM authentication in this domain" policy setting.

If you select "Enable all" the domain controller will log events for NTLM pass-through authentication requests from its servers and for its accounts which would be denied because "Deny all" is selected in the "Network security: Restrict NTLM: NTLM authentication in this domain" policy setting.

This policy is supported on at least Windows Server 2008 R2.

Note: Audit events are recorded on this computer in the "NTLMBlock" Log located under the Applications and Services Log/Microsoft/Windows/Security-NTLM.

Policy path: 

Computer Configuration\Windows Settings\Local Policies\Security Options

Supported on: 

At least Windows 7, Windows Server 2008 R2

Registry settings: 

MACHINE\System\CurrentControlSet\Services\Netlogon\Parameters\AuditNTLMInDomain

Reboot required: 

No