Out-File unnecessary characters - powershell

Question

I have the script below which pings a list of machines, outputs the result to CSV and gets the lastlogontimestamp of the machine.
It works fine, except the lastlogontimestamp comes out like this:
CCC-APP01,172.22.100.15,#{lastLogonDate=07/25/2018 13:24:54}
How can I get rid of the extra characters: #{lastlogondate=...}?
$OutputCSV = "C:\TEMP\OUPingResults.csv"
$SearchLocation = "OU=AA,OU=Servers,DC=LocA,DC=XYZ,DC=com"
$Computers = Get-ADComputer -Filter * -SearchBase $SearchLocation |
Select Name |
Sort-Object Name
$Computers = $Computers.Name
$Headers = "ComputerName,IP Address,LastLogonTimeStamp"
$Headers | Out-File -FilePath $OutputCSV -Encoding UTF8
foreach ($computer in $Computers) {
Write-host "Pinging $Computer"
$Test = Test-Connection -ComputerName $computer -Count 1 -ErrorAction SilentlyContinue -ErrorVariable Err
if ($test -ne $null) {
$IP = $Test.IPV4Address.IPAddressToString
$LastLogonTimeStamp = Get-ADComputer $Computer -Prop CN,lastLogonTimestamp |
Select #{n="lastLogonDate";e={[datetime]::FromFileTime($_.lastLogonTimestamp)}}
$Output = "$Computer,$IP,$LastLogonTimeStamp"
$Output | Out-File -FilePath $OutputCSV -Encoding UTF8 -Append
} else {
$Output = "$Computer,$Err"
$Output | Out-File -FilePath $OutputCSV -Encoding UTF8 -Append
}
}

Answer 1

The expression ... |Select-Object #{N='SomeName';E={"SomeValue"}} will produce an object that has a property named SomeName with the value "SomeValue".
What you see in the output is a string representation of this object.
If you want only the value, change the $LastLogonTimeStamp assignment to:
$LastLogonTimeStamp = [datetime]::FromFiletime((Get-ADComputer $Computer -Prop lastLogonTimestamp).lastLogonTimestamp)