Block NTLM (LM, NTLM, NTLMv2)
- Policy ID
- Pol_BlockNTLM
- Scope
- Computer Configuration
- Supported on
- At least Windows Server 2025, Windows 11
- Source
- Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
- Category
- Network › Lanman Workstation
Description
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.
Registry
ComputerHKEY_LOCAL_MACHINE
- BlockNTLMREG_DWORD