function Execute-SOAPRequest
(
        [Xml]    $SOAPRequest,
        [String] $URL
)
{
        write-host "Sending SOAP Request To Server: $URL"
        $soapWebRequest = [System.Net.WebRequest]::Create($URL)
        $soapWebRequest.Headers.Add("SOAPAction","`"http://www.facilities.co.za/valid8service/valid8service/Valid8Address`"")
        $soapWebRequest.ContentType = "text/xml;charset=`"utf-8`""
        $soapWebRequest.Accept      = "text/xml"
        $soapWebRequest.Method      = "POST"
       
        write-host "Initiating Send."
        $requestStream = $soapWebRequest.GetRequestStream()
        $SOAPRequest.Save($requestStream)
        $requestStream.Close()
       
        write-host "Send Complete, Waiting For Response."
        $resp = $soapWebRequest.GetResponse()
        $responseStream = $resp.GetResponseStream()
        $soapReader = [System.IO.StreamReader]($responseStream)
        $ReturnXml = [Xml] $soapReader.ReadToEnd()
        $responseStream.Close()
       
        write-host "Response Received."
        return $ReturnXml
}
$url = 'http://www.facilities.co.za/valid8service/valid8service.asmx'
$soap = [xml]@'
?xml version="1.0" encoding="utf-8"?>
soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
  soap12:Body>
    Valid8Address xmlns="http://www.facilities.co.za/valid8service/valid8service">
      ID>string/ID>
      Address1>/Address1>
      Address2>/Address2>
      Address3>/Address3>
      Address4>/Address4>
      Address5>/Address5>
      Address6>/Address6>
      PostCode>/PostCode>
    /Valid8Address>
  /soap12:Body>
/soap12:Envelope>
'@
$ret = Execute-SOAPRequest $soap $url

$ret | Export-Clixml  c:\1.xml;Get-Content c:\1.xml