PowerShell - Get Computers Stale +90 days

Save as a .ps1, this outputs a csv to temp listing all AD computers that haven't checked in within 90 days.

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$date = (Get-Date) - (New-TimeSpan -Days 90)

Get-ADcomputer -Filter 'lastLogondate -lt $date' | ft

# Select the canonicalName,lastlogondate and name for a more readable list

Get-ADcomputer -Filter 'lastLogondate -lt $date' -properties canonicalName,lastlogondate | select name,canonicalname,lastlogondate | Export-CSV c:\temp\ComputersStale90Days.csv -NoTypeInformation

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