$UserName = $env:USERNAME

$root = [ADSI]"LDAP://RootDSE"
$base = "LDAP://$($root.defaultNamingContext)"

$searchRoot = [ADSI]$base

$searcher = New-Object System.DirectoryServices.DirectorySearcher($searchRoot)
$searcher.Filter = "(&(objectCategory=person)(objectClass=user)(sAMAccountName=$UserName))"

$searcher.PageSize = 1

$result = $searcher.FindOne()

$props = $result.Properties

$DisplayName = $props["displayname"][0]
$Position    = $props["title"][0]
$Telefon     = $props["telephonenumber"][0]
$Mail        = $props["mail"][0]

# Signaturpfad
$File = "\\vsql01\FLOWFACT\subcura\Outlook_Signatur\ohne_KontaktBild\WIP-Dresden GmbH.html"

$html = Get-Content $File -Raw

$html = $html.Replace("{BEN_NAME}", $DisplayName)
$html = $html.Replace("{BEN_POSITION}", $Position)
$html = $html.Replace("{BEN_TelefonBuero}", $Telefon)
$html = $html.Replace("{BEN_email}", $Mail)

$TempFile = "$env:TEMP\signature_preview.html"

# schreiben
Set-Content -Path $TempFile -Value $html -Encoding UTF8

# anzeigen
Start-Process $TempFile