Policy

Audit SMB client SPN support

Windows 11 25H2

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Policy overview

Key metadata and intent for this policy.

ClassComputer
CategoryNetwork > Lanman Server
Supported onAt least Windows Server 2008 R2 or Windows 7

Supported OS tags: Windows10, Windows10RT, Windows11, Windows7, Windows8, Windows81, WindowsRT, WindowsRT81, WindowsServer2008, WindowsServer2012, WindowsServer2012R2, WindowsServer2016

This policy controls whether the SMB server audits the Service Principal Name (SPN) provided by SMB clients during authentication. If you enable this policy setting, the SMB server will log an event whenever an SMB client doesn't send SPN or sends an invalid SPN during authentication. This audit data can help identify clients that may be incompatible with SPN validation before enforcement is enabled on SMB server. If you disable or do not configure this policy setting, the SMB server will not log the event.

Internal name
Pol_AuditClientSpnSupport
Policy ID
38aef879a5d8
Elements
0

Registry values

How enabled and disabled states update the registry.

Registry locationTypeEnabled valueDisabled value
HKLM\Software\Policies\Microsoft\Windows\LanmanServer\AuditClientSpnSupportREG_DWORD
1
0

Policy elements

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This policy has no additional user input fields.

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