Für jedes Bild in einem vorgegebenen Verzeichnis wird das AD nach einem zum Dateinamen passenden Benutzername durchsucht. Bei Übereinstimmung werden die Attribute jpegPhoto und thumbnailPhoto aktualisiert
Die Bilder werden auf die erforderliche Größe skaliert.

Set-AdPhotos.ps1

# Set-ADPhotos.ps1
# Description: For each file in a given directory it searches AD for a matching username. When it finds a match it updates
#     the jpegPhoto and thumbnailPhoto attributes for the account with the jpg file
# Credit for ResizeImage Function goes to Lewis Roberts
# http://www.lewisroberts.com/2015/01/18/powershell-image-resize-function/
#
# USAGE: .\Set-ADPhotos.ps1 -jpgdir "c:\photos" -OU "LDAP://ou=staff,dc=foo,dc=com"
 
param (
    [string]$jpgdir,
    [string]$OU
)
 
Import-Module ActiveDirectory
 
Function ResizeImage() {
    param([String]$ImagePath, [Int]$Quality = 90, [Int]$targetSize, [String]$OutputLocation)
 
    Add-Type -AssemblyName "System.Drawing"
 
    $img = [System.Drawing.Image]::FromFile($ImagePath)
 
    $CanvasWidth = $targetSize
    $CanvasHeight = $targetSize
 
    #Encoder parameter for image quality
    $ImageEncoder = [System.Drawing.Imaging.Encoder]::Quality
    $encoderParams = New-Object System.Drawing.Imaging.EncoderParameters(1)
    $encoderParams.Param[0] = New-Object System.Drawing.Imaging.EncoderParameter($ImageEncoder, $Quality)
 
    # get codec
    $Codec = [System.Drawing.Imaging.ImageCodecInfo]::GetImageEncoders() | Where {$_.MimeType -eq 'image/jpeg'}
 
    #compute the final ratio to use
    $ratioX = $CanvasWidth / $img.Width;
    $ratioY = $CanvasHeight / $img.Height;
 
    $ratio = $ratioY
    if ($ratioX -le $ratioY) {
        $ratio = $ratioX
    }
 
    $newWidth = [int] ($img.Width * $ratio)
    $newHeight = [int] ($img.Height * $ratio)
 
    $bmpResized = New-Object System.Drawing.Bitmap($newWidth, $newHeight)
    $graph = [System.Drawing.Graphics]::FromImage($bmpResized)
    $graph.InterpolationMode = [System.Drawing.Drawing2D.InterpolationMode]::HighQualityBicubic
 
    $graph.Clear([System.Drawing.Color]::White)
    $graph.DrawImage($img, 0, 0, $newWidth, $newHeight)
 
    #save to file
    $bmpResized.Save($OutputLocation, $Codec, $($encoderParams))
    $bmpResized.Dispose()
    $img.Dispose()
}
 
foreach ($photo in (Get-ChildItem -Path $jpgdir -File)) {    
    $username = $photo.BaseName
    $resizefile = $jpgdir + "\resized\" + $photo.BaseName + ".jpg"
 
    Try{$sADUser = Get-ADUser $username -ErrorAction Stop}
        Catch {
            Write-Host ("$username not found") -ForegroundColor Red
            Continue
        }
 
    ResizeImage $photo.FullName 90 200 $resizefile
 
    $image = [Byte[]](Get-Content $resizefile -Encoding byte)
 
    Set-ADUser $username -Replace @{thumbnailPhoto=$image}
    Set-ADUser $username -Replace @{jpegPhoto=$image}
    Write-Host ("$username has been updated") -ForegroundColor Green    
}

https://www.koolaid.info/updating-photo-attributes-active-directory-powershell/