Get local User group members - Powershell

Question

$Output = 'C:\temp\Result.txt' $Servers = Get-Content 'C:\temp\ServerNames.txt' $ScriptBlock = { $Groups = Get-WmiObject Win32_GroupUser -ComputerName $Servers $LocalAdmins = $Groups | Where GroupComponent –like '*"Administrators"' $LocalAdmins |% { $_.partcomponent –match ".+Domain\=(.+)\,Name\=(.+)$" > $nul $matches[1].trim('"') + "\" + $matches[2].trim('"') } } foreach ($ServerNames in $Servers) { "Local Admin group members in $ServerNames" | Out-File $Output -Append Invoke-command -ScriptBlock $ScriptBlock -ComputerName $ServerNames | Out- File $Output -Append }

I am using the above mentioned script to get local admins group members to run against multiple servers, I am getting error -

Cannot validate argument on parameter 'ComputerName'. The argument is null or empty. Provide an argument that is not null or empty, and then try the command again. + CategoryInfo : InvalidData: (:) [Get-WmiObject], ParameterBindingValidationException + FullyQualifiedErrorId : ParameterArgumentValidationError,Microsoft.PowerShell.Commands.GetWmiObjectCommand + PSComputerName : Computer

Can you pls assist me to correct that...?

Server Names in the file ServerNames.txt are in this format mentioned below -

ServerNames.txt

Do you have a file named ServerNames.txt located in C:\temp with a list of server names in the file? — user5870571
– user5870571, Commented Mar 23, 2017 at 19:55
Applbtrn01 Applbtrn02 Applbtrn03 Applbtrn04 Applbtrn05 Applbtrn06 Applbtrn07 — V T
– V T, Commented Mar 23, 2017 at 20:04
Its one below the other...I was trying that same format here, for some reasons its not letting me — V T
– V T, Commented Mar 23, 2017 at 20:05

LotPings · Accepted Answer · 2017-03-24 14:28:21Z

$Output = 'C:\temp\Result.txt' $Servers= Get-Content 'C:\temp\ServerNames.txt' $ScriptBlock = { $Groups = Get-WmiObject Win32_GroupUser -ComputerName $Using:ServerName $LocalAdmins = $Groups | Where GroupComponent –like '*"Administrators"' $LocalAdmins | ForEach-Object { If($_.partcomponent –match ".+Domain\=(.+)\,Name\=(.+)$"){ $matches[1].trim('"') + "\" + $matches[2].trim('"') } } } ForEach ($ServerName in $Servers) { "Local Admin group members in $ServerName" | Out-File $Output -Append Invoke-command -ScriptBlock $ScriptBlock -ComputerName $ServerName | Out-File $Output -Append }

But IMO this could be a bit simplified without the unnecessary vars

$Output = 'C:\temp\Result.txt' $Servers= Get-Content 'C:\temp\ServerNames.txt' $ScriptBlock = { Get-WmiObject Win32_GroupUser -ComputerName $Using:ServerName | Where GroupComponent –like '*"Administrators"'| ForEach-Object { If($_.partcomponent –match ".+Domain\=(.+)\,Name\=(.+)$"){ $matches[1].trim('"') + "\" + $matches[2].trim('"') } } } ForEach ($ServerName in $Servers) { "Local Admin group members in $ServerName" | Out-File $Output -Append Invoke-command -ScriptBlock $ScriptBlock -ComputerName $ServerName | Out-File $Output -Append }

I am still getting the same error - Cannot validate argument on parameter 'ComputerName'. The argument is null or empty. Provide an argument that is not null or empty, and then try the command again. + CategoryInfo : InvalidData: (:) [Get-WmiObject], ParameterBindingValidationException + FullyQualifiedErrorId : ParameterArgumentValidationError,Microsoft.PowerShell.Commands.GetWmiObjectCommand + PSComputerName : Applbtrn07 — V T
– V T, Commented Mar 24, 2017 at 14:04
I changed the var inside the scriptblock to $Using:... to get actual values invoking. See this blog — LotPings
– LotPings, Commented Mar 24, 2017 at 14:29
@LotPings...its working fine. my apologies there were some typos in the script.Another thing is because its windows server 2008 R2...I am getting this message mentioned below - Connecting to remote server failed with the following error message : The client cannot connect to th e destination specified in the request. Verify that the service on the destination is running and is accepting requests . Consult the logs and documentation for the WS-Management service running on the destination, most commonly IIS or Win RM. run the command and configure WinRM service: "winrm quickconfig". — V T
– V T, Commented Mar 24, 2017 at 19:44
So the question is answered and you should check my asnwer. For the new problem investigate and eventually post another question. Good luck with this. — LotPings
– LotPings, Commented Mar 24, 2017 at 19:59

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