Skip to main content

HowTo Series Sample 2 - Accessing System Public Folders : OAB Stats script

The following script demonstrates how you can access System Level Public Folders (Non_IPM_Subtree) using the EWS Managed API and shows how to report on the status of the OAB (Offline Address Book) distribution folders. (Note on 2010 you can also do this with the Exchange Management Shell). It produces a CSV report like

The main script is based around the how to series template but because there is no enumeration to get to the Non_IPM_Subtree one trick is needed. The first thing is to bind to the normal Public Folder Root using PublicFoldersRoot Enum then use the ParentFolderId property of this folder to bind to the parent then search  for the Non_IPM_Subtree folder which will be a subfolder of this folder. Then you can query for any System Folder from this point in this example it finds the OAB folder queries for any subfolders under this folder and then finds any of these subfolders with Items and queries the size, number of Items and the Modified date of the last item.

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

  1. ## EWS Managed API Connect Script  
  2. ## Requires the EWS Managed API and Powershell V2.0 or greator    
  4. ## Load Managed API dll    
  5. Add-Type -Path "C:\Program Files\Microsoft\Exchange\Web Services\1.1\Microsoft.Exchange.WebServices.dll"    
  7. ## Set Exchange Version    
  8. $ExchangeVersion = [Microsoft.Exchange.WebServices.Data.ExchangeVersion]::Exchange2010_SP1    
  10. ## Create Exchange Service Object    
  11. $service = New-Object Microsoft.Exchange.WebServices.Data.ExchangeService($ExchangeVersion)    
  13. ## Set Credentials to use two options are availible Option1 to use explict credentials or Option 2 use the Default (logged On) credentials    
  15. #Credentials Option 1 using UPN for the windows Account    
  16. $creds = New-Object System.Net.NetworkCredential("","password")     
  17. $service.Credentials = $creds        
  19. #Credentials Option 2    
  20. #service.UseDefaultCredentials = $true    
  22. ## Choose to ignore any SSL Warning issues caused by Self Signed Certificates    
  24. [System.Net.ServicePointManager]::ServerCertificateValidationCallback = {$true}    
  26. ## 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    
  28. #CAS URL Option 1 Autodiscover    
  29. $service.AutodiscoverUrl("",{$true})    
  30. "Using CAS Server : " + $Service.url     
  32. #CAS URL Option 2 Hardcoded    
  34. #$uri=[system.URI] "https://casservername/ews/exchange.asmx"    
  35. #$service.Url = $uri      
  37. ## Optional section for Exchange Impersonation    
  39. #$service.ImpersonatedUserId = new-object Microsoft.Exchange.WebServices.Data.ImpersonatedUserId([Microsoft.Exchange.WebServices.Data.ConnectingIdType]::SmtpAddress, "")    
  42. #Define the FolderSize Extended Property  
  43. $PR_MESSAGE_SIZE_EXTENDED = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(3592, [Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Integer)  
  44. $Propset = new-object Microsoft.Exchange.WebServices.Data.PropertySet([Microsoft.Exchange.WebServices.Data.BasePropertySet]::FirstClassProperties)  
  45. $Propset.add($PR_MESSAGE_SIZE_EXTENDED)  
  47. $PFRoot = [Microsoft.Exchange.WebServices.Data.Folder]::Bind($service,[Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::PublicFoldersRoot)  
  48. $NonIPMPfRoot = [Microsoft.Exchange.WebServices.Data.Folder]::Bind($service,$PFRoot.ParentFolderId)  
  49. $fvFolderView =  New-Object Microsoft.Exchange.WebServices.Data.FolderView(1000)  
  50. $sfSearchFilter = new-object Microsoft.Exchange.WebServices.Data.SearchFilter+IsEqualTo([Microsoft.Exchange.WebServices.Data.FolderSchema]::DisplayName,"NON_IPM_SUBTREE")  
  51. $folders = $NonIPMPfRoot.Findfolders($sfSearchFilter,$fvFolderView)  
  52. foreach($folder in $folders.Folders){  
  53.     #$folder   
  54.     $sfSearchFilter1 = new-object Microsoft.Exchange.WebServices.Data.SearchFilter+IsEqualTo([Microsoft.Exchange.WebServices.Data.FolderSchema]::DisplayName,"OFFLINE ADDRESS BOOK")  
  55.     $fvFolderView1 =  New-Object Microsoft.Exchange.WebServices.Data.FolderView(1000)  
  56.     $fvFolderView1.Traversal = [Microsoft.Exchange.WebServices.Data.FolderTraversal]::Shallow;  
  57.     $ivItemView =  New-Object Microsoft.Exchange.WebServices.Data.ItemView(1000)  
  58.     $OABFolder = $folder.Findfolders($sfSearchFilter1,$fvFolderView1).Folders[0]  
  59.     $OABFolders = $OABFolder.Findfolders($fvFolderView1)  
  60.     foreach($OABSubFolder in $OABFolders.Folders){  
  61.         if($OABSubFolder.ChildFolderCount -gt 0){  
  62.             $OABSubFolder.DisplayName  
  63.             $fvFolderView2 =  New-Object Microsoft.Exchange.WebServices.Data.FolderView(1000)  
  64.             $fvFolderView2.Traversal = [Microsoft.Exchange.WebServices.Data.FolderTraversal]::Shallow;  
  65.             $fvFolderView2.PropertySet = $Propset  
  66.             $SubFolders = $OABSubFolder.Findfolders($fvFolderView2)  
  67.                 foreach($SubFolder in $SubFolders.Folders){  
  68.                 $rptObj = "" | select  RootFolderName,SubFolderName,FolderItemCount,FolderSize,NewestItemLastModified  
  69.                 $rptObj.RootFolderName = $OABSubFolder.DisplayName  
  70.                 $rptObj.SubFolderName = $SubFolder.DisplayName  
  71.                 $ivItemView =  New-Object Microsoft.Exchange.WebServices.Data.ItemView(1000)  
  72.                 $FindItems = $SubFolder.FindItems($ivItemView)  
  73.                 $rptObj.FolderItemCount = $FindItems.Items.Count  
  74.                 if($FindItems.Items.Count -gt 0){  
  75.                     $rptObj.NewestItemLastModified = $FindItems.Items[0].LastModifiedTime.ToString()  
  76.                 }  
  77.                 $folderSize = $null  
  78.                 if($SubFolder.TryGetProperty($PR_MESSAGE_SIZE_EXTENDED, [ref]$folderSize)){  
  79.                     $rptObj.FolderSize = [MATH]::Round($folderSize/1024,0)  
  80.                 }  
  82.                 $rptCollection += $rptObj  
  83.             }  
  85.         }  
  88.     }  
  89. }  
  90. $rptCollection | Export-Csv -NoTypeInformation c:\temp\OabStatReports.csv  

Popular posts from this blog

Export calendar Items to a CSV file using EWS and Powershell

Somebody asked about this last week and while I have a lot of EWS scripts that do access the Calendar I didn't have a simple example that just exported a list of the Calendar events with relevant information to a CSV file so here it is. I've talked on this one before in this howto  but when you query the calendar folder using EWS you need to use a CalendarView which will expand any recurring appointments in a calendar. There are some limits when you use a calendarview in that you can only return a maximum of 2 years of appointments at a time and paging will limit the max number of items to 1000 per call. So if you have a calendar with a very large number of appointments you need to break your query into small date time blocks. In this example script I'm just grabbing the next 7 days of appointments if you want to query a longer period you need to adjust the following lines (keeping in mind what I just mentioned) #Define Date to Query $StartDate = (Get-Date) $EndDate

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 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 '

The MailboxConcurrency limit and using Batching in the Microsoft Graph API

If your getting an error such as Application is over its MailboxConcurrency limit while using the Microsoft Graph API this post may help you understand why. Background   The Mailbox  concurrency limit when your using the Graph API is 4 as per . This is evaluated for each app ID and mailbox combination so this means you can have different apps running under the same credentials and the poor behavior of one won't cause the other to be throttled. If you compared that to EWS you could have up to 27 concurrent connections but they are shared across all apps on a first come first served basis. Batching Batching in the Graph API is a way of combining multiple requests into a single HTTP request. Batching in the Exchange Mail API's EWS and MAPI has been around for a long time and its common, for email Apps to process large numbers of smaller items for a variety of reasons.  Batching in the Graph is limited to a m
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.