PowerShell: ADD a local Administrator account to all windows servers from a list.

This is a guest post Mr. Troy Collins

<#  

This script will create a local user account on a remote system and added it to the Administrators group..

Writen by Troy Collin

#>

#################################

$pingerror = ".\nopingable.txt"

$already = ".\already.exists.txt"

$error = ".\error.txt"

$created = ".\created.txt"

$computers = Get-Content serverslist.txt

$Username = 'natadm'

$Password = Read-Host -Prompt "Enter password for $Username" -AsSecureString

##################################

########### Creating Report Directory #############

$FileExists = Test-Path "./Reporting"

If ($FileExists -eq $True) {

Write-Host "Reporting Directory already here moving on.. " -ForegroundColor Green

} else {

if ($FileExists -eq $false) {

Write-Host "Making Directory Called Reporting.." -ForegroundColor Red

New-Item ./reporting -Type directory

}

}

############ end of Reporting #####################

foreach ($computer in $computers) 

{

if (test-Connection -ComputerName $computer -Count 2 -Quiet ) { 

write-Host "$computer is alive and Pinging " -ForegroundColor Green

 Try { 

$checkuser = [adsi]::Exists("WinNT://$computer/$Username")

if($checkuser -NotContains $Username)

{

Write-host "creating user account and settting password on $computer"

$ADSIComp = [adsi]"WinNT://$computer" 

$NewUser = $ADSIComp.Create('User',$Username) 

#Create password 

$BSTR = [system.runtime.interopservices.marshal]::SecureStringToBSTR($Password)

$_password = [system.runtime.interopservices.marshal]::PtrToStringAuto($BSTR)

#Set password on account 

$NewUser.SetPassword(($_password))

$NewUser.SetInfo()

Write-host "Adding new Account to Local Adminitrators on $computer" 

$AdminGroup = [ADSI]"WinNT://$computer/Administrators,group"

$User = [ADSI]"WinNT://$computer/$UserName,user"

$AdminGroup.Add($User.Path)

write-Host "Account created on $computer" -foregroundcolor Green  

$computer | out-file ./reporting/$created -Append

}

else

{

      write-host "User $($username) already exists" 

$computer | out-file ./reporting/$already -Append

}

  

}

 Catch {

$computer | Out-File ./reporting/$error -Append

 }

} else

{ Write-Host "$computer does not respond adding to error.txt" -BackgroundColor White -ForegroundColor Red

  $computer | Out-File ./reporting/$pingerror -Append

}

}​

​