<# Untested sample code, use at your own risk! #>

## Setup the Exchange Service Binding
$uri = "https://exchangeserver/ews/exchange.asmx"
$exchangeservicebinding = new-webserviceproxy -NameSpace "EWS" -URI $uri -UseDefaultCredential -Class EWS
$exchangeservicebinding.RequestServerVersionValue = new-object EWS.RequestServerVersion
$exchangeservicebinding.RequestServerVersionValue.Version = [EWS.ExchangeVersionType]::Exchange2007_SP1
$exchangeservicebinding.Url = $uri

## Create and Populate the Parent Folder ID Collection
[EWS.DistinguishedFolderIdType]$parentfolderid = new-object EWS.DistinguishedFolderIdType
$parentfolderid.Id = [EWS.DistinguishedFolderIdNameType]::inbox
[EWS.BaseFolderIdType[]]$parentfolderids = $parentfolderid

## Create an ItemShape and set it to return All Properties
[EWS.ItemResponseShapeType]$itemshape = new-object EWS.ItemResponseShapeType
$itemshape.BaseShape = [EWS.DefaultShapeNamesType]::AllProperties

## Create the FindItemType object and populate with the Parent Folder Ids and Item Shape
[EWS.FindItemType]$finditemtype = new-object EWS.FindItemType
$finditemtype.ParentFolderIds = $parentfolderids
$finditemtype.ItemShape = $itemshape

## Make the call to the webservice
[EWS.FindItemResponseType]$finditemresponses = $exchangeservicebinding.FindItem($finditemtype)

## Loop through the returned messages and print some basic info
[EWS.MessageType]$messagetype
foreach($messagetype in $finditemresponses.ResponseMessages.Items[0].RootFolder.Item.Items)
{
    Write-Host "From: " $messagetype.From.Item.Name
    Write-Host "Subject: " $messagetype.Subject
    Write-Host "Received: " $messagetype.DateTimeReceived.Date
    Write-Host "-------------------------------------------------------"
    Write-Host "ItemId: " $messagetype.ItemId.Id
    Write-Host "======================================================="
    Write-Host
}
<# <a href="http://rickhallihan.com/files/samples/ews_ps_sample.ps1.txt">download code here</a> #>