Import-Module ActiveDirectory
#Create new password
$securePassword = ConvertTo-SecureString "TESTpassw0rd!" -AsPlainText -Force

#Prompt user for CSV file path
$filepath = Read-Host -Prompt "Please enter the path your CSV file"

#Import file into a variable
$users = Import-Csv $filepath

#Loop thru each row and gather info
ForEach ($user in $users) {

   $fname = $user.'First Name'
   $lname = $user.'Last Name'
   $OUpath= $user.'Organizational Unit'

   #Create new AD user for each user in CSV File
   New-ADUser -Name "$fname $lname" -GivenName $fname -Surname $lname -UserPrincipalName "$fname.$lname" -Path $OUpath -AccountPassword $securePassword -ChangePasswordAtLogon $True

echo "Account created for $fname $lname in $OUpath"
}

Import-Module : The specified module 'ActiveDirectory' was not loaded because no valid mod
ule file was found in any module directory.
At line:1 char:14
+ Import-Module <<<<  ActiveDirectory
    + CategoryInfo          : ResourceUnavailable: (ActiveDirectory:String) [Import-Modul
   e], FileNotFoundException
    + FullyQualifiedErrorId : Modules_ModuleNotFound,Microsoft.PowerShell.Commands.Import
   ModuleCommand

The term 'New-ADUser' is not recognized as the name of a cmdlet, function, script file, or
 operable program. Check the spelling of the name, or if a path was included, verify that
the path is correct and try again.
At line:19 char:14
+    New-ADUser <<<<  -Name "$fname $lname" -GivenName $fname -Surname $lname -UserPrincip
alName "$fname.$lname" -Path $OUpath -AccountPassword $securePassword -ChangePasswordAtLog
on $True
    + CategoryInfo          : ObjectNotFound: (New-ADUser:String) [], CommandNotFoundExce
   ption
    + FullyQualifiedErrorId : CommandNotFoundException

Account created for User1 1 in OU=Sales,OU=Admin,OU=Clients