I’ve been hunting around the web for a powershell script that will list the members of multiple groups and haven’t been able to write one so I’ve written my own.

This script isn’t intended to be perfect but it will give you the bare bones of how to write your script. For example, this script work on the basis of entering all or part of a group name and then reporting on that group. If you enter a blank or * from the group name then it will export user membership in all groups as direct members (add a  recursive switch if you need membership of nested groups). This is useful if you have a group naming convention as you can easily drill down into the groups you want.

It also doesn’t filter out computer accounts so it depends if that’s an issue for you and it reports against the whole AD but you can always filter the Get-ADGroup command to scope it to an individual OU or area of AD.

In any event, like I said I wasn’t able to find anything around to do this so hopefully, if you need to do this, this script will give you a good head start on exporting these values from your directory.

Here’s the script – if copying and pasting into notepad remember to correct some characters such as ‘ and “.

Import-Module ActiveDirectory
Write-Host “********************************************************”
Write-Host “* This script will dump out users in named groups, all *”
Write-host “* groups or a range of groups. You will be guided *”
Write-host “* through the process *”
Write-Host “* *”
Write-Host “* All output will be saved to C:SupportScriptOutput *”
Write-Host “********************************************************”
write-host

$strFileName = $(
$selection = read-host ‘Enter the name of file to save results to. Include an extention. (Default = Groupmembership.csv)’
if ($selection) {$selection} else {‘GroupMembership.csv’}
)

$strFileName = “C:SupportScriptOutput” + $strFilename
If (Test-Path $strFileName){
Remove-Item $strFileName
}

Write-Host
Write-Host ‘Enter name of group you would like to export’
Write-Host ‘The script will look for matching groups’
Write-Host
Write-Host ‘Entering the first part of the group name will return all matching groups’
Write-Host ‘For example, Entering “LG-APP-” without the quotation marks will return all application groups’
Write-Host
Write-Host ‘Pressing return will list membership of ALL groups’
Write-host
Write-Host ‘***** WARNING *****’
Write-Host
Write-Host ‘Exporting all group memberships will take some time as it will’
Write-Host ‘include all built in groups and distribution lists – use with caution’
Write-Host

$strGroupNames = $(
$selection = Read-Host ‘Enter name of group you would like to export (no value will return all groups)’
if ($selection) {$selection + ‘*’} else {‘*’}
)

Write-Host
Write-Host ‘Exporting teams with names like ‘ $strGroupNames ‘ to ‘ $strFilename
$data= ‘Group,UserName,UserID’
Write-Output $data | out-file -FilePath $strFileName -Append
$groups = Get-ADGroup -filter {name -like $strGroupNames}
foreach ($Group in $Groups)
{
$usernames = Get-ADGroupMember $($group.name)

foreach ($user in $usernames)
{
$data = $Null
$data = $data + $group.name + “,” + $user.name + “,” + $user.saAMAccountName
Write-Output $data | out-file -FilePath $strFileName -Append

}
}