Howard, yes, I verified the key/value. However, they do not exist by default, only if you set/reset the policy.

It should also be possible to write the value to "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" instead, but then it would not be a policy, and I haven't tried it yet as I set it via LPO.
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There are two types of vessels, submarines and targets.