Спасибо за помощь
Kazun`у! Скрипт отлично работает!
Конечный скрипт
Код:

Import-Module ActiveDirectory
$Users = Import-Csv -Delimiter ";" -Path "C:\Users\Администратор\Desktop\user.csv"
$allou = Get-ADOrganizationalUnit -Filter * -SearchBase "OU=GUU,DC=edu,DC=guu"
foreach ($User in $Users)
{
$ou = $allou | Where {$_.Name -eq $User.OU}
if ($ou)
{
$OU = $ou.DistinguishedName
}
else
{
$OU = "OU=Others,OU=GUU, DC=edu,DC=guu"
}
$Password = $User.Password
$Detailedname = $User.LastName + " " + $User.FirstName + " " + $User.MiddleName
$UserFirstname = $User.FirstName
$UserLastName = $User.LastName
$JobTitle = $User.JobTitle
$SAM= $User.Login + "@edu.guu"
New-ADUser -Name $Detailedname -SamAccountName $User.Login -UserPrincipalName $SAM -DisplayName $Detailedname -GivenName $User.FirstName -Surname $User.LastName -Title $JobTitle -AccountPassword (ConvertTo-SecureString -AsPlainText "P@ssword2" -Force) -Enabled $true -Path $OU
}
Заголовок csv файла
Код:

Login,Password,LastName,FirstName,MiddleName,OU,JobTitle