Bulk Update of Employee Type in Active Directory

12026334, 

The error message points out that there is no parameter named "Employee-Type".  Looking at the available parameters for Set-ADUser shows there is also nothing for "employeeType".  This means you'll have to use the -Replace to process your updates. 

Check if the below code works in your environment, and don't forget to remove "-WhatIf" before running in production.  Please note that I removed the $EUserType variable as it wasn't necessary in the script you presented; Import-CSV is piped directly to ForEach-Object. 

Import-Module ActiveDirectory
Import-Csv "C:\Scripts\EmployeeType21.csv" | 
    ForEach-Object {
        $User = $_. Name
        $Type = $_.EmployeeType
        Set-ADUser $User -Replace @{EmployeeType = $Type } -WhatIf
    }