I need a script that will find the computer a user last logged into.

Question

I am still learning scripting, I need a script that will allow me to pull in usernames from a csv file. Find what computer they last logged into and output that to an csv file.
I have looked all over and can't find exactly what I need.
 I found the following script but I need  to add the resuitsize unlimited but can not figure out where to put it we have a large environment. Also I need to be able to grab username from a csv file. Any assistance you can provide is appreciated.
##  Find out what computers a user is logged into on your domain by running the script
##  and entering in the requested logon id for the user.
##  This script requires the free Quest ActiveRoles Management Shell for Active Directory
##  snapin  http://www.quest.com/powershell/activeroles-server.aspx
Add-PSSnapin Quest.ActiveRoles.ADManagement -ErrorAction SilentlyContinue
$ErrorActionPreference = "SilentlyContinue"
# Retrieve Username to search for, error checks to make sure the username
# is not blank and that it exists in Active Directory
Function Get-Username {
$Global:Username = Read-Host "Enter username you want to search for"
if ($Username -eq $null){
Write-Host "Username cannot be blank, please re-enter username!!!!!"
Get-Username}
$UserCheck = Get-QADUser -SamAccountName $Username
if ($UserCheck -eq $null){
Write-Host "Invalid username, please verify this is the logon id for the account"
Get-Username}
get-username resultsize unlimited
$computers = Get-QADComputer | where {$_.accountisdisabled -eq $false}
foreach ($comp in $computers)
$Computer = $comp.Name
$ping = new-object System.Net.NetworkInformation.Ping
  $Reply = $null
  $Reply = $ping.send($Computer)
  if($Reply.status -like 'Success'){
#Get explorer.exe processes
$proc = gwmi win32_process -computer $Computer -Filter "Name = 'explorer.exe'"
#Search collection of processes for username
ForEach ($p in $proc) {
$temp = ($p.GetOwner()).User
if ($temp -eq $Username){
write-host "$Username is logged on $Computer"

Answer 1

If you are querying by user "resultset size" will be of no use.
You also have functions that are never used and the body code doe snot look for users.
Here is what you scrip looks like if printed well.  It is just a jumble of pasted together and unrelated items.
## Find out what computers a user is logged into on your domain by running the script
## and entering in the requested logon id for the user.
## This script requires the free Quest ActiveRoles Management Shell for Active Directory
## snapin http://www.quest.com/powershell/activeroles-server.aspx
Add-PSSnapin Quest.ActiveRoles.ADManagement -ErrorAction SilentlyContinue
$ErrorActionPreference = "SilentlyContinue"
# Retrieve Username to search for, error checks to make sure the username
# is not blank and that it exists in Active Directory
Function Get-Username {
$Global:Username = Read-Host "Enter username you want to search for"
if ($Username -eq $null) {
Write-Host "Username cannot be blank, please re-enter username!!!!!"
Get-Username
$UserCheck = Get-QADUser -SamAccountName $Username
if ($UserCheck -eq $null) {
Write-Host "Invalid username, please verify this is the logon id for the account"
Get-Username
get-username resultsize unlimited
$computers = Get-QADComputer | where { $_.accountisdisabled -eq $false }
foreach ($comp in $computers) {
$Computer = $comp.Name
$ping = new-object System.Net.NetworkInformation.Ping
$Reply = $null
$Reply = $ping.send($Computer)
if ($Reply.status -like 'Success') {
#Get explorer.exe processes
$proc = gwmi win32_process -computer $Computer -Filter "Name = 'explorer.exe'"
#Search collection of processes for username
ForEach ($p in $proc) {
$temp = ($p.GetOwner()).User
if ($temp -eq $Username) {
write-host "$Username is logged on $Computer"
I suggest finding the original code then use the learning link at the top of this page to help you understand how it works in Powershell.
¯\_(ツ)_/¯