Remotely shut down all active computers on a domain

SutdownActiveComputers.ps1

# Shuts down computers without notice

$DateOffset = 30
$StartDate  = (Get-Date).AddDays(-($DateOffset))
$SearchBase = "OU=Domain Computers, DC=contoso, DC=com"

Get-ADComputer -Filter {
    ( LastLogonDate -gt $StartDate ) -and
    ( Name -ne "$env:COMPUTERNAME" )
} -SearchBase $SearchBase -Properties LastLogonDate |
Foreach-Object { Stop-computer -ComputerName $_.Name -Force -AsJob }