Powershell Script: Set extensionAttribute using EmployeeID or samAccountName

In my example I will use ExtensionAttribute4, of course you can use another one as well!

Find attached a script that using the EmployeeID:

----------------------------------------------------- # Set ExtensionAttribute4 using AD Users EmployeeID
#csv file
#employeeID,extensionAttribute4
#1482216,45837
#9999998,9999

Import-module ActiveDirectory
$Path = "C:\admin\UsersExt4.csv"
$users = Get-Content –Path $Path | ConvertFrom-CSV
$users | foreach {
    $_.psobject.properties | foreach { if ($_.value -eq "") { $_.value = $null }}

    $eid = $_.employeeID
    $user = Get-ADUser -Filter {employeeID -eq $eid}

    Set-ADUser $user.samaccountname -add @{extensionattribute4 = $_.extensionAttribute4}
}

-----------------------------------------------------

And now with the samAccountName:

-----------------------------------------------------
################################################
# File path: c:\admin\UsersExt4.csv
#
# samAccountName,extensionAttribute4
# username.1,Test12345
# username.2,Test12345
################################################

Import-module ActiveDirectory
Import-Csv C:\admin\UsersExt4.csv | ForEach-Object {Set-ADUser $_.samAccountName -Replace @{extensionAttribute4=$_.extensionAttribute4} }

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