>In my windows server 2016 I launch powershell and I write
>
>get-smbclientconfiguration
>
>I'm doing this because I want to see the values for
>
>DirectoryCacheLifetime
>FileInfoCacheLifetime
>FileNotFoundCacheLifetime
>
>I see the values which are not 0
>
>I don't understand that I see their values here but there are no entries associated with those keys when I do a regedit and the I look to find those keys in
>
>HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\LanmanWorkstation\Parameters
>
>Why?

If there are no registry entries, Windows uses internal default values. To override those defaults you have to manually create the registry entries and set their values.