如何从 Powershell 脚本中的 Get-ADUser 过滤器获取结果，以便验证该用户是否存在？

Question

FIXED: I did have to change if ($null -eq $FoundUser) and then if essentiall NULL -eq NULL , that user doesn't exist... SORRY

I would really love some help as I've on/off been struggling with this logic with Get-ADUser for user creation.

I'm using Powershell 7.0 - 7.2.1 (latter currently) and having this problem with VSCode and running it in "console". We have a 2008 R2 forest but 2016 and 2019 DCs. Essentially "Get-ADUser -Filter" doesn't return any value. I'm trying to use an if statement for if $null -ne $SamAccountName.

Any thoughts? I thought I found the answer here but no luck for me.

$Users = Import-Csv -delimiter "`t" -Path "C:\Users\michel_m\Documents\Scripts\PowerShell\Staff\StaffData.txt"
    #$sam = ""
    #Generate data to use in creating user below
    foreach ($User in $Users) {

    $SAMAccount = $User.Username
    $Filter = "sAmAccountname -eq '$SamAccount'
    $FoundUser = Get-ADUser -Filter $Filter
    Write-Host "HERE IS" $FoundUser
    $results = $FoundUser.SamAccountName

    #if ($null -ne $FoundUser)
    if ($null -ne $results)
    {
        Write-Host $results "Are the results"
        Write-Host $User "is the user"
        Write-Host $SAMAccount "Is the SAM user"
        Write-Host $FoundUser "Is the found user"
     #NewUser_Function
     ($Dates + " - " + $user.username + " has been created") | out-file -filepath $OutputFile1  -append
     
     #Write-Host "Pause 15 seconds"
     Start-Sleep 15
     Write-Host $user.username + " Has been created"
     $Body = $user.username + " Has been created"

     #schtasks.exe /run /s "OHDC01" /tn "GADS Sync - Users"
    }
    else
    {
        Write-Host $Filter
        Write-Host $results "Are the results"
        Write-Host $User "is the user"
        Write-Host $SAMAccount "Is the SAM user"
        Write-Host $FoundUser "Is the found user"
        Write-Host $null is null
     write-host $user.username + " already exists"
     ($Dates + " - " + $user.username + " already exists") | out-file -filepath $OutputFile2  -append
     $Body =  $user.username + " already exists",
                "\\OHDC01\C$\Scripts\StaffCreation\NewStaff\",
                "\\OHDC01\C$\Scripts\StaffCreation\NewStaff\"
    }
}

Output

HERE IS 
sAmAccountname -like 'mangold_m' | Select-object SamAccountName
 Are the results
@{FirstName=Michelle; LastName=Mangold; BuildingName=OAK; Position=Aide; Username=mangold_m; Email=mangold_m@Wonderfullife.org} is the user
mangold_m Is the SAM user
 Is the found user
 is null
mangold_m +  already exists
HERE IS 
sAmAccountname -like 'metzner_m' | Select-object SamAccountName
 Are the results
@{FirstName=Melissa; LastName=Metzner; BuildingName=OHHS; Position=Aide; Username=metzner_m; Email=metzner_m@Wonderfullife.org} is the user
metzner_m Is the SAM user
 Is the found user
 is null
metzner_m +  already exists

Answer 1

Thank you for updating you got your solution.

Here I also have tried from my side you can also use this small PowerShell script for validating the user existance.

$Users = Import-Csv -Path "C:\Users\RahulShaw\test.csv"
 Foreach ($User in $Users){

$Username = $User.Username
$FoundUser = Get-ADUser -Filter "sAmAccountName -eq '$Username'"
$results = $FoundUser.SamAccountName
Write-Host $results
if($null -eq $FoundUser){
    write-host "Username '$Username' does not yet exist in active directory" 
}
else{
 write-host "Username '$Username'  exist in active directory" 
}

}