list local administrator group members.

simple command prompt (Assuming you have psexec)

for /f %a in (c:\serverlist.txt) do psexec \\%a cmd /c net localgroup Administrators

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You can use the PSEXEC.exe (Windows SysInternals) tool to run the net command on multiple servers:

psexec @serverfile.txt cmd "/c net localgroup administrators"

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Just put a list of servernames in the serverfile.txt

If you are looking for a PowerShell script then, Similar question is answered here.. Check and let me know if you have any trouble in getting report..
https://www.experts-exchange.com/questions/28505177/Output-local-administrators-from-multiple-servers-Output-file.html

I tried to pipe the results to a file by putting a  >>c:\result.txt at the end.

Is there a way I can display the server name before each result in the result file?

for /f %a in (c:\serverlist.txt) do psexec \\%a cmd /c hostname & net localgroup Administrators >> \\computer\c$\gmembers.txt
                                          

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computer would be the name of the computer you are running the command from.

becraig, I ran that line but still do not see the hostname in the gmembers.txt file.

By the way, you will need %% instead of %.

hmm that sounds weird:

You only need %% if you run as a bat or cmd file, from the command line % is what you need (I did not see a need to save a one liner as a cmd or bat)

for /f %a in (c:\serverlist.txt) do psexec \\%a cmd /c echo ============================== & hostname &echo ============================== & net localgroup administrators >> \\computer\c$\gmembers.txt

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Did you try the PS script?  It will give you a neat csv file which you can open in excel.

sorry, becraig, I tried but still do not see hostname is being displayed in my results.txt.  Here is what I use:

for /f %a in (c:\serverlist.txt) do psexec \\%a cmd /c hostname & net localgroup Administrators >> c:\results.txt

Then we can just repeat the variable, though I also see Subsun's report is a nice csv:

 for /f %a in (c:\serverlist.txt) do psexec \\%a cmd /c echo %a & net localgroup Administrators >> c:\results.txt 

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becraig,

It is still not good and same result.  The "echo %a" result did not get piped into the results.txt file but only being shown at the command prompt when I run it.

Subsun, I tried the PS script and the result file only contains information on the last server name in the list.

Try..

function get-localusers {
 param(
 [Parameter(Mandatory=$true,valuefrompipeline=$true)]
 [string]$strComputer
 )
 
 $Select = "Name","Class","Parent" | %{  
 Invoke-Expression "@{n='$_';e={ `$_.GetType().InvokeMember('$_', 'GetProperty', `$Null, `$_, `$Null) }}"
 }
 
 If (Test-Connection $strComputer -Count 2 -Quiet){
  try{
  $computer = [ADSI]("WinNT://" + $strComputer + ",computer")
  $AdminGroup = $computer.psbase.children.find("Administrators")
  $Adminmembers= $AdminGroup.psbase.invoke("Members") | Select $Select
    foreach ($admin in $Adminmembers) {
    $admin | Select @{N="ComputerName";E={$strComputer}},@{N="Administrators";E={"$(($_.parent -SPLIT "/")[-1])\$($_.Name)"}},Class,@{N="Parent";E={($_.parent -SPLIT "/")[-1]}}
    }
 }catch{ 
 "" | Select @{N="ComputerName";E={$strComputer}},@{N="Administrators";E={"Access Denied"}},Class,Parent
 }
 }
Else {
 "" | Select @{N="ComputerName";E={$strComputer}},@{N="Administrators";E={"Not able to Ping"}},Class,Parent
 }
}
Get-Content "C:\Powershell\Servers.txt" | %{get-localusers $_} | Select ComputerName,Administrators,Class,Parent | Export-Csv "C:\Powershell\LocalAdm$((get-date).toString('MM-dd-yyyy')).csv" -NTI

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Lol my bad

for /f %a in (c:\serverlist.txt) do psexec \\%a cmd /c echo %a   \\%a\c$\result.txt & net localgroup Administrators >> 
\\%a\c$\result.txt
I suggest saving to the computer you're running from.  \\%a\c$\result.txt

becraig,

You script is still not working as expected.  Can you please test it?

for /f %a in (c:\serverlist.txt) do psexec \\%a cmd /c echo %a >>  \\%a\c$\result.txt & net localgroup Administrators >>
\\%a\c$\result.txt

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Sorry, becraig.  It is still not working.  I do not want to pipe the result to the servers C drive.  

I am going to have to use Subsun's script as it has the display I need.  

Thanks for your help.