PowerShell - Discover usernames from lastname, firstname in a csv path

Save as a .ps1, When ran asks for path of populated CSV. then Outputs Usernames to C:\Temp\LastNamesToSAM.csv

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$a = Read-Host "Enter CSV path with lastname, firstname in Column A"

$users = Get-Content $a

$Results = ForEach ($user in $users)

{

Get-ADUser -LDAPFilter "(anr=$user)" -Properties Name,SamAccountName | select Name,SamAccountName

}

$Results | Export-CSV -path C:\Temp\LastNamesToSAM.csv -NoTypeInformation

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