请尝试将代码“$user = $CSVFile.users”更改为“$user = $Files.users"。希望它能对您有所帮助。

请尝试使用以下PowerShell代码：

Add-PSSnapin Microsoft.SharePoint.PowerShell -EA SilentlyContinue
$CSVPath = "D:\Temp\userss.csv"
$CSVFile = Import-CSV $CSVPath
$web = Get-SPWeb -Identity https://................./
$DocLibsName = "Bilder der websitesammlung"
$folder = $web.Folders[$DocLibsName].SubFolders

foreach($Files in $CSVFile)
{
    foreach($loopItem in $Files.users) {
        Write-Host "Retreiving user..." -ForegroundColor Blue
        $user = $loopItem
        
        $items = $folder.Files | where {$_.Title -eq $user}
        If($items.Title -contains $user)
        {
            $items.Delete()
            Write-Host $user "deleted" -ForegroundColor DarkGreen
        }
        Else { 
            Write-Host $user"not found" -ForegroundColor DarkRed 
        }
    }
}
Write-Host "Finished" -ForegroundColor Green