I discovered something last week – I had not blogged about little things that I thought I had blogged about. What the heck does that mean? It means that I tried to reference my blog for something because I thought “I totally blogged about that”…and found out that was not the case.
Starting now, I am fixing this situation. There was something that popped up today that called for a PowerShell script and the Get-ADGroupMember cmdlet – get a list of users from a list of groups. Some users are in there more than once so this needs to be a distinct list, unless you are into manually cleaning up things like this, and then I will be sad for you. Because that is kinda sad.
I originally wrote a script with two arrays (one for the initial list and one for the de-duped list of users), but even though this is quick and dirty, that was a little too dirty. Enter the Group-Object cmdlet – it takes this list of names and groups them. No black magic this time. Just a cmdlet, that comes baked into PowerShell giving me what I need.
What? You wanted the code too? Oh, OK.
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<# Name: activedirectory get list of users from multiple groups.ps1 Author: Amy Herold Date: 24 October 2017 Purpose: Get distinct list of users from multiple AD groups. #> $groups = @('Admins','Managers','Some Other Group') $people = New-Object System.Collections.ArrayList; $people.Clear(); #--------------get list of users from list of groups-------------- foreach ($g in $groups) { $people.Add(@(Get-ADGroupMember -Identity $g | select name)) | Out-Null; } #------------use group-object and get a distinct list of names-------------- $people.Name | Group-Object | select name |
There you have it – quick, dirty and to the point. Enjoy. 🙂
UPDATE: Mathias Jessen tweeted a one liner for this….so no need for the one array! Woohoo!
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('Admins','Managers','Some Other Group' |Get-ADGroupMember |Group-Object -Property Name -NoElement).Name |
I was trying to do this but was also just trying to get it done, and if in doubt, I slap things in arrays. Thanks Mathias!
