Policy

All Processes

Windows 11 25H2

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Policy overview

Key metadata and intent for this policy.

ClassUser
CategoryWindows Components > Internet Explorer > Security Features > MK Protocol Security Restriction
Supported onAt least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1

Supported OS tags: Windows10, Windows10RT, Windows11, Windows7, Windows8, Windows81, WindowsRT, WindowsRT81, WindowsServer2003, WindowsServer2008, WindowsServer2012, WindowsServer2012R2, WindowsServer2016, WindowsVista, WindowsXP

The MK Protocol Security Restriction policy setting reduces attack surface area by preventing the MK protocol. Resources hosted on the MK protocol will fail. If you enable this policy setting, the MK Protocol is disabled for all processes. Any use of the MK Protocol is blocked. If you disable or do not configure this policy setting, the MK Protocol is enabled.

Internal name
IESF_PolicyAllProcesses_3
Policy ID
51d6e643a3ee
Elements
0

Registry values

How enabled and disabled states update the registry.

Registry locationTypeEnabled valueDisabled value
HKCU\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_DISABLE_MK_PROTOCOL\*REG_SZ
1
0

Policy elements

Inputs and configuration options exposed by this policy.

This policy has no additional user input fields.

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