ADSI query running well on some boxes and failing on others - powershell

Question

I am working on a PowerShell script for a customer to pull information from Servers before they are decommissioned. I have had to jump through a couple of hoops, as they have 2008 and even some 2003 servers, which don't always support the same Get-CimInstance queries, but for the most part it is working as expected. One section I have as yet been unable to fix however is pulling a list of all local groups and their members, like so:
$localGroups = Invoke-Command -ScriptBlock {
[ADSI]$S = "WinNT://$($env:computername)"
$S.children.Where({$_.class -eq 'group'}) |
Select #{Name="Name";Expression={$_.name.value}},
#{Name="Members";Expression={
[ADSI]$group = "$($_.Parent)/$($_.Name),group"
$members = $Group.psbase.Invoke("Members")
($members | ForEach-Object {$_.GetType().InvokeMember("Name", 'GetProperty', $null, $_, $null)}) -join ";"
}
}
} -ComputerName $sPC | Select PSComputername,Name,Members
This works just fine on Server 2012 and above, but fails on 2008 and below. The specific error states:
Method invocation failed because [System.DirectoryServices.DirectoryEntries] doesn't contain a method named 'Where'
So the OS does not like the $S.Children.Where() call. Just curious if anyone knows of another way to format it for use with 2008 and earlier. I could probably go the old WMI call route, but that takes forever to finish.

Answer 1

I ended up finding a (fairly) quick way of doing it, works on all OS flavors:
function get-groups {
param ($strcomputer)
$groups = gwmi win32_group -ComputerName $strcomputer
return $groups
}
function Get-LocalGroupMembers {
param(
[parameter(Mandatory=$true,ValueFromPipeline=$true,ValueFromPipelineByPropertyName=$true)]
[Alias("Name")]
[string]$ComputerName,
[string]$GroupName = "Administrators"
)
begin {}
process {
$ComputerName = $ComputerName.Replace("`$", '')
$arr = #()
$wmi = Get-WmiObject -ComputerName $ComputerName -Query "SELECT * FROM Win32_GroupUser WHERE GroupComponent=`"Win32_Group.Domain='$ComputerName',Name='$GroupName'`""
if ($wmi -ne $null) {
foreach ($item in $wmi) {
$arr += ($item.PartComponent.Substring($item.PartComponent.IndexOf(',') + 1).Replace('Name=', '').Replace("`"", ''))
}
}
$hash = #{ComputerName=$ComputerName;Members=$arr}
return $hash
}
end{}
}
$sPC = "Server2008R2"
$a = 1
$adapterInfo = Get-CimInstance -query "Select * From
Win32_NetworkAdapterConfiguration Where IPenabled = 'TRUE'" -ComputerName $sPC
$serialNumber = Get-CimInstance -query "Select * From Win32_Bios" -ComputerName $sPC
$shares = Get-CimInstance -query "Select * From Win32_Share" -ComputerName $sPC
$localGroups = get-groups $sPC
$myObject = New-Object -TypeName PSObject
$myObject | Add-Member -MemberType NoteProperty -Name ComputerName -Value $adapterInfo.PSComputerName
$myObject | Add-Member -MemberType NoteProperty -Name Description -Value $adapterInfo.Description
$adapterInfo | ForEach-Object {
$_.IPAddress |
ForEach-Object {
$myObject | Add-Member -MemberType NoteProperty -Name "IPAddress$($a)" -Value $_
$a++
}
}
$myObject | Add-Member -MemberType NoteProperty -Name SerialNumber -Value $serialNumber.SerialNumber
foreach ($share in $shares) {
if ($share.Name -ne "C$" -and
$share.Name -ne "D$" -and
$share.Name -ne "ADMIN$" -and
$share.Name -ne "IPC$") {
$myObject | Add-Member -MemberType NoteProperty -Name "Share $($share.Name)" -Value $share.Path
}
}
foreach ($group in $localGroups) {
$members = ((Get-LocalGroupMembers -ComputerName $sPC -GroupName $group.Name).Members) -join "; "
if ($members.Length -ne 0) {
$myObject | Add-Member -MemberType NoteProperty -Name "$($group.Name) Members" -Value $members
}
}
$myObject | Export-Csv -Path "<Path to Folder>\$($sPC).csv" -NoTypeInformation