Import-Module ActiveDirectory

$path = Split-Path -parent $MyInvocation.MyCommand.Definition
$importPath = $path + "users.txt"
# EDIT to fit your domain
$domain = "@yourdomain.local"
# EDIT to fit the ou you want to create your users in - make shure it exists
$location = "OU=SharePoint,OU=Service Users,OU=Users,DC=yourdomain,DC=local"
# EDIT to fit your password policy - otherwise creation will fail
$initialPass = ConvertTo-SecureString -AsPlainText "Pass@Word1" -force

Import-CSV $importPath | ForEach-Object {
	$sam = $_.Username.ToLower()
	Try   { $exists = Get-ADUser -LDAPFilter "(sAMAccountName=$sam)" }
    Catch { }
    If(!$exists)
    {
        $upn = $sam + $domain
		New-ADUser $_.Name -SamAccountName $sam -Path $location -DisplayName $_.Name -UserPrincipalName $upn -AccountPassword $initialPass

        $user = Get-ADUser -LDAPFilter "(sAMAccountName=$sam)"

        Enable-ADAccount -Identity $user
        Unlock-ADAccount -Identity $user
	}
}