Policy

Block NTLM (LM, NTLM, NTLMv2)

This policy controls if the SMB client will block NTLM for remote connection authentication. If you enable this policy setting, the SMB client won't use NTLM for remote connection authentication. If you disable or do not configure this policy setting, the SMB client can still use NTLM.

Policy
PackMicrosoft Windows
CategoryNetwork / Lanman Workstation
Policy ID5bdea4597e3e
Internal namePol_BlockNTLM

Registry

Copy registry mappings

HKLM\Software\Policies\Microsoft\Windows\LanmanWorkstation\BlockNTLM (enabled) = 1
HKLM\Software\Policies\Microsoft\Windows\LanmanWorkstation\BlockNTLM (disabled) = 0

Policy notes

This policy controls if the SMB client will block NTLM for remote connection authentication. If you enable this policy setting, the SMB client won't use NTLM for remote connection authentication. If you disable or do not configure this policy setting, the SMB client can still use NTLM.

Related policies

Alternative Port MappingsAudit insecure guest logonAudit server does not support encryptionAudit server does not support signingBlock NTLM Server Exception ListCipher suite orderDisable SMB compression