Skip to main content

Finding RMS Items in a Mailbox using EWS

If you want to search for emails that have been protected using AD Rights Managed Service using EWS there are a few challenges. How RMS works with Email it is documented in the following Exchange Protocol document https://msdn.microsoft.com/en-us/library/cc463909(v=exchg.80).aspx. The important part when it comes to searching is PidNameContentClass property https://msdn.microsoft.com/en-us/library/office/cc839681.aspx which on RMS messages gets set to rpmsg.message. So to search for this Internet Header you can use a SearchFilter like the following to define the ExtendProperty to search folder

$contentclassIh = New-Object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition([Microsoft.Exchange.WebServices.Data.DefaultExtendedPropertySet]::InternetHeaders,"content-class",[Microsoft.Exchange.WebServices.Data.MapiPropertyType]::String);  
$sfItemSearchFilter = new-object Microsoft.Exchange.WebServices.Data.SearchFilter+IsEqualTo($contentclassIh,"rpmsg.message")

Putting it together in a script that searches a Folder in a Mailbox based on a MailboxName and FolderPath This script is on GitHub https://github.com/gscales/Powershell-Scripts/blob/master/GetRMSItems.ps1  (An important point to note while you can find email that has been protected using RMS with EWS you won't be able to read the encrypted contents using EWS).

function Get-RMSItems{
    param
 ( 
     [Parameter(Position=0, Mandatory=$true)] [string]$MailboxName,
  [Parameter(Position=1, Mandatory=$true)] [System.Management.Automation.PSCredential]$Credentials,
  [Parameter(Position=2, Mandatory=$true)] [String]$FolderPath

 )
 begin
 {
  $service = connect-exchange -Mailbox $MailboxName -Credentials $Credentials
  $Folder = Get-FolderFromPath -FolderPath $FolderPath -MailboxName $MailboxName -service $service 
  $contentclassIh = New-Object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition([Microsoft.Exchange.WebServices.Data.DefaultExtendedPropertySet]::InternetHeaders,"content-class",[Microsoft.Exchange.WebServices.Data.MapiPropertyType]::String);  
  $sfItemSearchFilter = new-object Microsoft.Exchange.WebServices.Data.SearchFilter+IsEqualTo($contentclassIh,"rpmsg.message") 
  #Define ItemView to retrive just 1000 Items    
  $ivItemView =  New-Object Microsoft.Exchange.WebServices.Data.ItemView(1000)    
  $fiItems = $null    
  do{    
      $fiItems = $service.FindItems($Folder.Id,$sfItemSearchFilter,$ivItemView)    
      #[Void]$service.LoadPropertiesForItems($fiItems,$psPropset)  
      foreach($Item in $fiItems.Items){      
    Write-Output $Item
      }    
      $ivItemView.Offset += $fiItems.Items.Count    
  }while($fiItems.MoreAvailable -eq $true)  
 
 }
}

function Get-FolderFromPath{
 param (
   [Parameter(Position=0, Mandatory=$true)] [string]$FolderPath,
   [Parameter(Position=1, Mandatory=$true)] [string]$MailboxName,
   [Parameter(Position=2, Mandatory=$true)] [Microsoft.Exchange.WebServices.Data.ExchangeService]$service,
   [Parameter(Position=3, Mandatory=$false)] [Microsoft.Exchange.WebServices.Data.PropertySet]$PropertySet
    )
 process{
  ## Find and Bind to Folder based on Path  
  #Define the path to search should be seperated with \  
  #Bind to the MSGFolder Root  
  $folderid = new-object Microsoft.Exchange.WebServices.Data.FolderId([Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::MsgFolderRoot,$MailboxName)   
  $tfTargetFolder = [Microsoft.Exchange.WebServices.Data.Folder]::Bind($service,$folderid)  
  #Split the Search path into an array  
  $fldArray = $FolderPath.Split("\") 
   #Loop through the Split Array and do a Search for each level of folder 
  for ($lint = 1; $lint -lt $fldArray.Length; $lint++) { 
         #Perform search based on the displayname of each folder level 
         $fvFolderView = new-object Microsoft.Exchange.WebServices.Data.FolderView(1) 
   if(![string]::IsNullOrEmpty($PropertySet)){
    $fvFolderView.PropertySet = $PropertySet
   }
         $SfSearchFilter = new-object Microsoft.Exchange.WebServices.Data.SearchFilter+IsEqualTo([Microsoft.Exchange.WebServices.Data.FolderSchema]::DisplayName,$fldArray[$lint]) 
         $findFolderResults = $service.FindFolders($tfTargetFolder.Id,$SfSearchFilter,$fvFolderView) 
         if ($findFolderResults.TotalCount -gt 0){ 
             foreach($folder in $findFolderResults.Folders){ 
                 $tfTargetFolder = $folder                
             } 
         } 
         else{ 
             Write-host ("Error Folder Not Found check path and try again")  
             $tfTargetFolder = $null  
             break  
         }     
     }  
  if($tfTargetFolder -ne $null){
   return [Microsoft.Exchange.WebServices.Data.Folder]$tfTargetFolder
  }
  else{
   throw ("Folder Not found")
  }
 }
}

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  
}

One last sample that does a statistics report of all RMS items in a Mailbox using a SearchFilter on the AllItems Search Folder (which is created by the Outlook Desktop client) this outputs a report of the RMS Items and the size of those item in each folder that looks like


This script is on GitHub at https://github.com/gscales/Powershell-Scripts/blob/master/GetRMSItems.ps1

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  
} 

function Get-RMSItems-AllItemSearch{
    param
 ( 
     [Parameter(Position=0, Mandatory=$true)] [string]$MailboxName,
  [Parameter(Position=1, Mandatory=$true)] [System.Management.Automation.PSCredential]$Credentials

 )
 begin
 {
  $FolderCache = @{}
  $service = connect-exchange -Mailbox $MailboxName -Credentials $Credentials
  $folderid= new-object Microsoft.Exchange.WebServices.Data.FolderId([Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::MsgFolderRoot,$MailboxName)  
  $MsgRoot = [Microsoft.Exchange.WebServices.Data.Folder]::Bind($service,$folderid)
  GetFolderPaths -FolderCache $FolderCache -service $service -rootFolderId $MsgRoot.Id
  $PR_FOLDER_TYPE = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(13825,[Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Integer);
  $folderidcnt = new-object Microsoft.Exchange.WebServices.Data.FolderId([Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::Root,$MailboxName)
  $fvFolderView =  New-Object Microsoft.Exchange.WebServices.Data.FolderView(1000)
  $fvFolderView.Traversal = [Microsoft.Exchange.WebServices.Data.FolderTraversal]::Shallow;
  $sf1 = new-object Microsoft.Exchange.WebServices.Data.SearchFilter+IsEqualTo($PR_FOLDER_TYPE,"2")
  $sf2 = new-object Microsoft.Exchange.WebServices.Data.SearchFilter+IsEqualTo([Microsoft.Exchange.WebServices.Data.FolderSchema]::DisplayName,"allitems")
  $sfSearchFilterCol = new-object  Microsoft.Exchange.WebServices.Data.SearchFilter+SearchFilterCollection([Microsoft.Exchange.WebServices.Data.LogicalOperator]::And)
  $sfSearchFilterCol.Add($sf1)
  $sfSearchFilterCol.Add($sf2)
  $fiResult = $Service.FindFolders($folderidcnt,$sfSearchFilterCol,$fvFolderView)
  $fiItems = $null
  $RptCollection = @{}
  $ItemView = New-Object Microsoft.Exchange.WebServices.Data.ItemView(1000)
  if($fiResult.Folders.Count -eq 1)
  {
   $Folder = $fiResult.Folders[0]
      $contentclassIh = New-Object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition([Microsoft.Exchange.WebServices.Data.DefaultExtendedPropertySet]::InternetHeaders,"content-class",[Microsoft.Exchange.WebServices.Data.MapiPropertyType]::String);  
   $sfItemSearchFilter = new-object Microsoft.Exchange.WebServices.Data.SearchFilter+IsEqualTo($contentclassIh,"rpmsg.message") 
   #Define ItemView to retrive just 1000 Items    
   $ivItemView =  New-Object Microsoft.Exchange.WebServices.Data.ItemView(1000)    
   $fiItems = $null    
   do{    
       $fiItems = $service.FindItems($Folder.Id,$sfItemSearchFilter,$ivItemView)    
        #[Void]$service.LoadPropertiesForItems($fiItems,$psPropset)  
       foreach($Item in $fiItems.Items){     
     if($FolderCache.ContainsKey($Item.ParentFolderId.UniqueId))
     {
      if($RptCollection.ContainsKey($FolderCache[$Item.ParentFolderId.UniqueId]))
      {
       $RptCollection[$FolderCache[$Item.ParentFolderId.UniqueId]].TotalItems++
       $RptCollection[$FolderCache[$Item.ParentFolderId.UniqueId]].TotalSize+= $Item.Size
      }
      else
      {
       $fldRptobj = "" | Select FolderName,TotalItems,TotalSize
       $fldRptobj.FolderName = $FolderCache[$Item.ParentFolderId.UniqueId]
       $fldRptobj.TotalItems = 1
       $fldRptobj.TotalSize = $Item.Size 
       $RptCollection.Add($fldRptobj.FolderName,$fldRptobj)
      }     
     }
       }    
       $ivItemView.Offset += $fiItems.Items.Count    
   }while($fiItems.MoreAvailable -eq $true)    
   
  }
  write-output $RptCollection.Values
 }
 

}

function GetFolderPaths
{
 param (
      [Parameter(Position=0, Mandatory=$true)] [Microsoft.Exchange.WebServices.Data.FolderId]$rootFolderId,
   [Parameter(Position=1, Mandatory=$true)] [Microsoft.Exchange.WebServices.Data.ExchangeService]$service,
   [Parameter(Position=2, Mandatory=$true)] [PSObject]$FolderCache,
   [Parameter(Position=3, Mandatory=$false)] [String]$FolderPrefix
    )
 process{
 #Define Extended properties  
 $PR_FOLDER_TYPE = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(13825,[Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Integer);  
 $PR_MESSAGE_SIZE_EXTENDED = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(3592, [Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Long);
 #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);  
 $psPropertySet.Add($PR_MESSAGE_SIZE_EXTENDED)
 $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 = $service.FindFolders($rootFolderId,$sfSearchFilter,$fvFolderView)  
     foreach($ffFolder in $fiResult.Folders){
         #Try to get the FolderPath Value and then covert it to a usable String 
   $foldpathval = $null
         if ($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)  
         }
   if($FolderCache.ContainsKey($ffFolder.Id.UniqueId) -eq $false)
   {
    if ([string]::IsNullOrEmpty($FolderPrefix)){
     $FolderCache.Add($ffFolder.Id.UniqueId,($fpath)) 
    }
    else
    {
     $FolderCache.Add($ffFolder.Id.UniqueId,("\" + $FolderPrefix + $fpath)) 
    }
   }
     } 
     $fvFolderView.Offset += $fiResult.Folders.Count
 }while($fiResult.MoreAvailable -eq $true)  
 }
}


Labels:

Popular posts from this blog

Export calendar Items to a CSV file using Microsoft Graph and Powershell

For the last couple of years the most constantly popular post by number of views on this blog has been  Export calendar Items to a CSV file using EWS and Powershell closely followed by the contact exports scripts. It goes to show this is just a perennial issue that exists around Mail servers, I think the first VBS script I wrote to do this type of thing was late 90's against Exchange 5.5 using cdo 1.2. Now it's 2020 and if your running Office365 you should really be using the Microsoft Graph API to do this. So what I've done is create a PowerShell Module (and I made it a one file script for those that are more comfortable with that format) that's a port of the EWS script above that is so popular. This script uses the ADAL library for Modern Authentication (which if you grab the library from the PowerShell gallery will come down with the module). Most EWS properties map one to one with the Graph and the Graph actually provides better information on recurrences then...
Read more

Downloading a shared file from Onedrive for business using Powershell

I thought I'd quickly share this script I came up with to download a file that was shared using One Drive for Business (which is SharePoint under the covers) with Powershell. The following script takes a OneDrive for business URL which would look like https://mydom-my.sharepoint.com/personal/gscales_domain_com/Documents/Email%20attachments/filename.txt This script is pretty simple it uses the SharePoint CSOM (Client side object Model) which it loads in the first line. It uses the URI object to separate the host and relative URL which the CSOM requires and also the SharePointOnlineCredentials object to handle the Office365 SharePoint online authentication. The following script is a function that take the OneDrive URL, Credentials for Office365 and path you want to download the file to and downloads the file. eg to run the script you would use something like ./spdownload.ps1 ' https://mydom-my.sharepoint.com/personal/gscales_domain_com/Documents/Email%20attachments/filen...
Read more

Sending a MimeMessage via the Microsoft Graph using the Graph SDK, MimeKit and MSAL

One of the new features added to the Microsoft Graph recently was the ability to create and send Mime Messages (you have been able to get Message as Mime for a while). This is useful in a number of different scenarios especially when trying to create a Message with inline Images which has historically been hard to do with both the Graph and EWS (if you don't use MIME). It also opens up using SMIME for encryption and a more easy migration path for sending using SMTP in some apps. MimeKit is a great open source library for parsing and creating MIME messages so it offers a really easy solution for tackling this issue. The current documentation on Send message via MIME lacks any real sample so I've put together a quick console app that use MSAL, MIME kit and the Graph SDK to send a Message via MIME. As the current Graph SDK also doesn't support sending via MIME either there is a workaround for this in the future my guess is this will be supported.
Read more
All sample scripts and source code is provided by for illustrative purposes only. All examples are untested in different environments and therefore, I cannot guarantee or imply reliability, serviceability, or function of these programs.

All code contained herein is provided to you "AS IS" without any warranties of any kind. The implied warranties of non-infringement, merchantability and fitness for a particular purpose are expressly disclaimed.