Exchange Attachment statistics reporting with EWS and Powershell

The following script is a combination of a couple of other scripts I've posted in the past, what it does is compiles statistics of the messages with and without attachments in a Mailbox and then produces a report. To do this in EWS you need to look at every Item in the mailbox, if the item has attachments it determines how large these attachments are and keeps a running tab of the largest attachment in the mailbox. In Exchange there are a number of different attachment types but EWS divides them into two distinct types, File Attachments and ItemAttachment which are basically attached Exchange Items. This script compile statistics around these two distinct types but doesn't process down to the embeeded attachment level. The results of all the requests are added together to produce a final report that reflects the attachment statistics for the entire mailbox. A picture is worth a thousand words so it produces a report like

To get the information about the Items in the Mailbox the FindItem Operation is used, however as FindItem doesn't return detailed information about attachments the LoadPropertiesForItems method is used which does a batch GetItem request on a collection of results. One thing to note is the AttachmentSize information isn't returned by EWS in Exchange 2007 so this script will only work for Exchange 2010 up.

This script will prompt for what security credentials you want to use and these creds need full access to the Mailboxes your scanning (an alternative would be to use Impersonation but that would require the script to be changed).

You need to feed the script with a CSV file like

smtpaddress
user1@domain.com
user2@domain.com

I've put a download of this script here the script itself looks like.

$Script:rptCollection = @()
## Load Managed API dll
Add-Type -Path "C:\Program Files\Microsoft\Exchange\Web Services\2.0\Microsoft.Exchange.WebServices.dll"
## Set Exchange Version
$ExchangeVersion = [Microsoft.Exchange.WebServices.Data.ExchangeVersion]::Exchange2010_SP2
## Create Exchange Service Object
$service = New-Object Microsoft.Exchange.WebServices.Data.ExchangeService($ExchangeVersion)
## Set Credentials to use two options are availible Option1 to use explict credentials or Option 2 use the Default (logged On) credentials
#Credentials Option 1 using UPN for the windows Account
$psCred = Get-Credential
$creds = New-Object System.Net.NetworkCredential($psCred.UserName.ToString(),$psCred.GetNetworkCredential().password.ToString())
$service.Credentials = $creds
#Credentials Option 2
#service.UseDefaultCredentials = $true
## Choose to ignore any SSL Warning issues caused by Self Signed Certificates
## Code From http://poshcode.org/624
## Create a compilation environment
$Provider=New-Object Microsoft.CSharp.CSharpCodeProvider
$Compiler=$Provider.CreateCompiler()
$Params=New-Object System.CodeDom.Compiler.CompilerParameters
$Params.GenerateExecutable=$False
$Params.GenerateInMemory=$True
$Params.IncludeDebugInformation=$False
$Params.ReferencedAssemblies.Add("System.DLL") | Out-Null
$TASource=@'
namespace Local.ToolkitExtensions.Net.CertificatePolicy{
public class TrustAll : System.Net.ICertificatePolicy {
public TrustAll() {
}
public bool CheckValidationResult(System.Net.ServicePoint sp,
System.Security.Cryptography.X509Certificates.X509Certificate cert,
System.Net.WebRequest req, int problem) {
return true;
}
}
}
'@
$TAResults=$Provider.CompileAssemblyFromSource($Params,$TASource)
$TAAssembly=$TAResults.CompiledAssembly
## We now create an instance of the TrustAll and attach it to the ServicePointManager
$TrustAll=$TAAssembly.CreateInstance("Local.ToolkitExtensions.Net.CertificatePolicy.TrustAll")
[System.Net.ServicePointManager]::CertificatePolicy=$TrustAll
## end code from http://poshcode.org/624
## Set the URL of the CAS (Client Access Server) to use two options are availbe to use Autodiscover to find the CAS URL or Hardcode the CAS to use
#CAS URL Option 1 Autodiscover
#$service.AutodiscoverUrl($MailboxName,{$true})
#"Using CAS Server : " + $Service.url
#CAS URL Option 2 Hardcoded
#$uri=[system.URI] "https://casservername/ews/exchange.asmx"
#$service.Url = $uri
## Optional section for Exchange Impersonation
#$service.ImpersonatedUserId = new-object Microsoft.Exchange.WebServices.Data.ImpersonatedUserId([Microsoft.Exchange.WebServices.Data.ConnectingIdType]::SmtpAddress, $MailboxName)
function Process-Mailbox{
param (
$SmtpAddress = "$( throw 'SMTPAddress is a mandatory Parameter' )"
)
process{
$rptObj = "" | select MailboxName,TotalItem,TotalItemSize,TotalItemsNoAttach,TotalItemsNoAttachSize,TotalItemsAttach,TotalItemsAttachSize,TotalFileAttachments,TotalFileAttachmentsSize,TotalItemAttachments,TotalItemAttachmentsSize,LargestAttachmentSize,LargestAttachmentName
$rptObj.MailboxName = $SmtpAddress
$rptObj.TotalItem = 0
$rptObj.TotalItemSize = [Int64]0
$rptObj.TotalItemsNoAttach = 0
$rptObj.TotalItemsNoAttachSize = [Int64]0
$rptObj.TotalItemsAttach = 0
$rptObj.TotalItemsAttachSize = [Int64]0
$rptObj.TotalFileAttachments = 0
$rptObj.TotalFileAttachmentsSize = [Int64]0
$rptObj.TotalItemAttachments = 0
$rptObj.TotalItemAttachmentsSize = [Int64]0
$rptObj.LargestAttachmentSize = [Int64]0
$rptObj.LargestAttachmentName = ""
"Processing Mailbox : " + $SmtpAddress
#check Anchor header for Exchange 2013/Office365
if($service.HttpHeaders.ContainsKey("X-AnchorMailbox")){
$service.HttpHeaders["X-AnchorMailbox"] = $SmtpAddress
}else{
$service.HttpHeaders.Add("X-AnchorMailbox", $SmtpAddress);
}
"AnchorMailbox : " + $service.HttpHeaders["X-AnchorMailbox"]
#Define ItemView to retrive just 1000 Items
$ivItemView = New-Object Microsoft.Exchange.WebServices.Data.ItemView(1000)
$psPropset= new-object Microsoft.Exchange.WebServices.Data.PropertySet([Microsoft.Exchange.WebServices.Data.BasePropertySet]::IdOnly)
$psPropset.Add([Microsoft.Exchange.WebServices.Data.ItemSchema]::Size)
$psPropset.Add([Microsoft.Exchange.WebServices.Data.ItemSchema]::DateTimeReceived)
$psPropset.Add([Microsoft.Exchange.WebServices.Data.ItemSchema]::DateTimeCreated)
$ivItemView.PropertySet = $psPropset
$TotalSize = 0
$TotalItemCount = 0
#Define Function to convert String to FolderPath
function ConvertToString($ipInputString){
$Val1Text = ""
for ($clInt=0;$clInt -lt $ipInputString.length;$clInt++){
$Val1Text = $Val1Text + [Convert]::ToString([Convert]::ToChar([Convert]::ToInt32($ipInputString.Substring($clInt,2),16)))
$clInt++
}
return $Val1Text
}
#Define Extended properties
$PR_FOLDER_TYPE = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(13825,[Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Integer);
$folderidcnt = new-object Microsoft.Exchange.WebServices.Data.FolderId([Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::MsgFolderRoot,$SmtpAddress)
#Define the FolderView used for Export should not be any larger then 1000 folders due to throttling
$fvFolderView = New-Object Microsoft.Exchange.WebServices.Data.FolderView(1000)
#Deep Transval will ensure all folders in the search path are returned
$fvFolderView.Traversal = [Microsoft.Exchange.WebServices.Data.FolderTraversal]::Deep;
$psPropertySet = new-object Microsoft.Exchange.WebServices.Data.PropertySet([Microsoft.Exchange.WebServices.Data.BasePropertySet]::FirstClassProperties)
$PR_Folder_Path = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(26293, [Microsoft.Exchange.WebServices.Data.MapiPropertyType]::String);
#Add Properties to the Property Set
$psPropertySet.Add($PR_Folder_Path);
$fvFolderView.PropertySet = $psPropertySet;
#The Search filter will exclude any Search Folders
$sfSearchFilter = new-object Microsoft.Exchange.WebServices.Data.SearchFilter+IsEqualTo($PR_FOLDER_TYPE,"1")
$fiResult = $null
#The Do loop will handle any paging that is required if there are more the 1000 folders in a mailbox
do {
$fiResult = $Service.FindFolders($folderidcnt,$sfSearchFilter,$fvFolderView)
foreach($ffFolder in $fiResult.Folders){
$foldpathval = $null
#Try to get the FolderPath Value and then covert it to a usable String
if ($ffFolder.TryGetProperty($PR_Folder_Path,[ref] $foldpathval))
{
$binarry = [Text.Encoding]::UTF8.GetBytes($foldpathval)
$hexArr = $binarry | ForEach-Object { $_.ToString("X2") }
$hexString = $hexArr -join ''
$hexString = $hexString.Replace("FEFF", "5C00")
$fpath = ConvertToString($hexString)
}
$totalItemCnt = 1
if($ffFolder.TotalCount -ne $null){
$totalItemCnt = $ffFolder.TotalCount
"Processing FolderPath : " + $fpath + " Item Count " + $totalItemCnt
}
else{
"Processing FolderPath : " + $fpath
}
if($totalItemCnt -gt 0){
#Define ItemView to retrive just 1000 Items
$ivItemView = New-Object Microsoft.Exchange.WebServices.Data.ItemView(1000)
$psPropset= new-object Microsoft.Exchange.WebServices.Data.PropertySet([Microsoft.Exchange.WebServices.Data.BasePropertySet]::IdOnly)
$psPropset.Add([Microsoft.Exchange.WebServices.Data.ItemSchema]::Size)
$psPropset.Add([Microsoft.Exchange.WebServices.Data.ItemSchema]::DateTimeReceived)
$psPropset.Add([Microsoft.Exchange.WebServices.Data.ItemSchema]::DateTimeCreated)
$psPropset.Add([Microsoft.Exchange.WebServices.Data.ItemSchema]::Attachments)
$psPropset.Add([Microsoft.Exchange.WebServices.Data.ItemSchema]::HasAttachments)
$fipsPropset= new-object Microsoft.Exchange.WebServices.Data.PropertySet([Microsoft.Exchange.WebServices.Data.BasePropertySet]::IdOnly)
$ivItemView.PropertySet = $fipsPropset
$fiItems = $null
do{
$fiItems = $service.FindItems($ffFolder.Id,$ivItemView)
if($fiItems.Items.Count -gt 0){
[Void]$service.LoadPropertiesForItems($fiItems,$psPropset)
"processing : " + $fiItems.Items.Count + " Items"
foreach($Item in $fiItems.Items){
$rptObj.TotalItem +=1
$rptObj.TotalItemSize += [Int64]$Item.Size
if($Item.Attachments.Count -gt 0){
$rptObj.TotalItemsAttach +=1
$rptObj.TotalItemsAttachSize += [Int64]$Item.Size
foreach($Attachment in $Item.Attachments){
if($Attachment -is [Microsoft.Exchange.WebServices.Data.FileAttachment]){
$rptObj.TotalFileAttachments +=1
$rptObj.TotalFileAttachmentsSize += $Attachment.Size
$attachSize = [Math]::Round($Attachment.Size/1MB,2)
if($attachSize -gt $rptobj.LargestAttachmentSize){
$rptobj.LargestAttachmentSize = $attachSize
$rptobj.LargestAttachmentName = $Attachment.Name
}
}
else{
$rptObj.TotalItemAttachments +=1
$rptObj.TotalItemAttachmentsSize += $Attachment.Size
}
}
}
else{
$rptObj.TotalItemsNoAttach +=1
$rptObj.TotalItemsNoAttachSize += [Int64]$Item.Size
}
}
}
$ivItemView.Offset += $fiItems.Items.Count
}while($fiItems.MoreAvailable -eq $true)
}
}
$fvFolderView.Offset += $fiResult.Folders.Count
}while($fiResult.MoreAvailable -eq $true)
#convert Sizes to MB
if($rptObj.TotalItemSize -ne 0){
$rptObj.TotalItemSize = [Math]::Round($rptObj.TotalItemSize/1MB)
}
if($rptObj.TotalItemsNoAttachSize -ne 0){
$rptObj.TotalItemsNoAttachSize = [Math]::Round($rptObj.TotalItemsNoAttachSize/1MB)
}
if($rptObj.TotalItemsAttachSize -ne 0){
$rptObj.TotalItemsAttachSize = [Math]::Round($rptObj.TotalItemsAttachSize/1MB)
}
if($rptObj.TotalFileAttachmentsSize -ne 0){
$rptObj.TotalFileAttachmentsSize = [Math]::Round($rptObj.TotalFileAttachmentsSize/1MB)
}
if($rptObj.TotalItemAttachmentsSize -ne 0){
$rptObj.TotalItemAttachmentsSize = [Math]::Round($rptObj.TotalItemAttachmentsSize/1MB)
}
$Script:rptCollection += $rptObj
}
}
Import-Csv -Path $args[0] | ForEach-Object{
if($service.url -eq $null){
$service.AutodiscoverUrl($_.SmtpAddress,{$true})
"Using CAS Server : " + $Service.url
}
Try{
Process-Mailbox -SmtpAddress $_.SmtpAddress
}
catch{
LogWrite("Error processing Mailbox : " + $_.SmtpAddress + $_.Exception.Message.ToString())
}
}
$Script:rptCollection | Export-Csv -NoTypeInformation -Path c:\temp\mbAttachReport.csv

How to test SMTP using Opportunistic TLS with Powershell and grab the public certificate a SMTP server is using

Most email services these day employ Opportunistic TLS when trying to send Messages which means that wherever possible the Messages will be encrypted rather then the plain text legacy of SMTP. This method was defined in RFC 3207 "SMTP Service Extension for Secure SMTP over Transport Layer Security" and there's a quite a good explanation of Opportunistic TLS on Wikipedia https://en.wikipedia.org/wiki/Opportunistic_TLS . This is used for both Server to Server (eg MTA to MTA) and Client to server (Eg a Message client like Outlook which acts as a MSA) the later being generally Authenticated. Basically it allows you to have a normal plain text SMTP conversation that is then upgraded to TLS using the STARTTLS verb. Not all servers will support this verb so if its not supported then a message is just sent as Plain text. TLS relies on PKI certificates and the administrative issue s that come around certificate management like expired certificates which is why ...

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Exchange Attachment statistics reporting with EWS and Powershell

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