Remove list of users from Local Administrators group on list of computers

[charlie4872]

Hello, we are trying to remove users from the local administrators group on a bunch of computers. After that we will implement a GPO to control who is added to the local admin group on all computers. What I am looking for is a script to remove multiple users from the local admin group a list of multiple computers. The code below does not seem to be working correctly. Can anyone help with what I am doing wrong?

$users = get-content .\users.txt
$computers = get-content .\computers.txt
foreach ($computer in $computers){
invoke-command -computername $computer -scriptblock {Get-LocalGroupMember -Group 'Administrators' | where {$_.objectclass -like $users} | Remove-LocalGroupmember Administrators}
}

[#2]

You can follow along here.

How to remove bulk user local admin right wirh Powershell - Microsoft Q&A

[#3 · Accepted solution]

@charlie4872 

Hi.

There's a number of issues with your "Invoke-Command" statement, the most notable being this part:

where {$_.objectclass -like $users}

$_.objectClass isn't something you're ever going to measure a user account name against.

We also can't see examples of the data you're pulling from the users.txt and computers.txt files, meaning there could be issue there, too, and we wouldn't know.

Anyhow, forging ahead.

Let's say your data from computers.txt looks like this:

client01.mydomain.com
client02.mydomain.com
client03.mydomain.com

And your users.txt looks like this:

mydomain\user01
mydomain\user02
mydomain\user03

Then your script - in its simplest form - would look like this:

Invoke-Command -ComputerName (Get-Content -Path .\computers.txt) -ArgumentList (Get-Content -Path .\users.txt) -ScriptBlock { $args | Remove-LocalGroupMember -Group "Administrators" -ErrorAction:SilentlyContinue; }

Cheers,

Lain

[#4]

Hello Lain, I have tested the script you provided and it works perfectly. Your help is greatly appreciated!

Thanks!