Bulk Add AD Computers to AD Group

PowerShell Help
2

PowerShell 3+:

$computers = Get-ADComputers * | Select -ExpandProperty SamAccountName
Get-ADGroup testgroup | Add-ADGroupMember -Member $computers

Add-ADGroupMember might actually be able to take ADComputer objects. I don’t remember off the top of my head and I don’t have a test environment at hand right now.

PowerShell 2:

$computers = @() # list of computer distinguishedName values

$group = [ADSI]"LDAP://CN=TestGroup,OU=Groups,DC=example,DC=com"
foreach($computerDn in $computers) {
    # The .Add() method outputs the number of objects in the list, so Out-Null to avoid unnecessary clutter
    $group.Properties["member"].Add($computerDn) | Out-Null 
}
$group.CommitChanges()