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I would like to understand the difference between this registry key,

MACHINE\System\CurrentControlSet\Services\Netlogon\Parameters\MaximumPasswordAge=4,30

and the local computer policy settings via mmc,

Local Computer Policy -> Computer Configuration -> Windows Settings -> Security Settings -> Account Policies -> Maximum Password Age

why are there 2 different values, and when I change one it doesn't affect the other/

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2
  • The Registry showing a value of "4, 30" is odd. That key is a REG_DWORD, which means you should only be seeing a hex value and its decimal equivalent. The Windows default is 0x0000001e (30). (Though, interestingly enough that does not match the default Local Policy value of 42.)
    – Iszi
    Aug 3, 2014 at 21:43
  • Related
    – Iszi
    Aug 3, 2014 at 21:49

2 Answers 2

Reset to default
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The first one is a Machine Password setting, it controls the age of a silently configured 'machine password', which is used when machines connect to each other.

The second one is an Windows Password setting, which controls User Account Passwords.

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I don't know about this particular case, but most of the times windows stores policy settings (configured in mmc) in the registry.

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