This policy setting prevents connected users from being enumerated on domain-joined computers. If you enable this policy setting the Logon UI will not enumerate any connected users on domain-joined computers.If you disable or do not configure this policy setting connected users will be enumerated on domain-joined computers.
Policy path:
System\Logon
Scope:
Machine
Supported on:
At least Windows Server 2012 Windows 8 or Windows RT
Registry settings:
HKLM\Software\Policies\Microsoft\Windows\System!DontEnumerateConnectedUsers
Filename:
Logon.admx