That is correct, but the script can be adapted to for example display "na" when the key is not present.
Get-VM | %{
$option = $_.ExtensionData.Config.ExtraConfig | where{$_.Key -eq "isolation.tools.setinfo.disable"}
$_ | Select @{N="Name";E={$_.Name}},@{N="Value";E={if($option){$option.Value}else{"na"}}}
}
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Blog: LucD notes
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