Local users on domain-joined computers must not be enumerated.

From Windows 8 Security Technical Implementation Guide

Associated with IA controls: ECSC-1

SV-48304r2_rule Local users on domain-joined computers must not be enumerated.

Vulnerability discussion

The username is one part of logon credentials that could be used to gain access to a system. Preventing the enumeration of users limits this information to authorized personnel.

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Fix text

Configure the policy value for Computer Configuration -> Administrative Templates -> System -> Logon -> "Enumerate local users on domain-joined computers" to "Disabled".

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