Recently, I was asked if it is possible to remove stub items. The reason was they were going to transition to a newer version of Exchange and they wouldn’t be using the archiving solution in the new environment. When required, vendor tooling would be used to search through the existing archives.
In such cases it makes sense to remove the stubs from the mailbox, which are shortcut messages that points to a copy of the original message in the archive solution. The new environment won’t contain the required Outlook plugins or extensions to retrieve the original message from the archive using the stub, making the stub lead to a partial or empty message.
To identify stubs, one can filter on an attribute of each item, MessageClass. This attribute defines which kind of item it is (in fact, determines what form Outlook should use in order to present or process the information). Examples of MessageClass definitions are IPM.Note (regular e-mail messages), IPM.Note.EnterpriseVault.Shortcut (message archived by Enterprise Vault) or IPM.ixos-archive (message archived by Opentext/IXOS LiveLink E-Mail Archive).
To identify stubs from Outlook, add the Message Class field to your Outlook view, e.g.:
When you want to remove the stubs using Outlook, you can utilize the Advanced Find function of Outlook, but that is a very labor intensive, tedious and non-centralized per-mailbox procedure:
Now I wouldn’t have started this article if the same thing wasn’t possible with a little bit of scripting against Exchange Web Services and so the script Remove-MessagesClassItems.ps1 was born. Using this script requires Exchange 2007 or later and Exchange Web Services Managed API 2.0 (or later) which you can download here or you can copy the Microsoft.Exchange.WebServices.DLL locally and adjust the DLL path mentioned in the script when necessary. The script has been developed and tested against Exchange 2007, meaning it’s a PowerShell 1.0 script which should be compatible with later versions of PowerShell or Exchange.
Also take notice that since you’ll be processing user mailboxes, you’ll need to have full mailbox access or impersonation permissions; the latter is preferred. For details on how to configure impersonation, I have written this article.
The script Remove-MessagesClassItems.ps1 uses the following syntax:
Remove-MessageClassItems.ps1 [-Identity] [-MessageClass] [-Server ] [-Impersonation] [-Credentials ] [-DeleteMode ] [-ScanAllFolders] [-Before ] [-MailboxOnly] [-ArchiveOnly] [-IncludeFolders <String [-IncludeFolders <String>] [-ExcludeFolders <String>] [-WhatIf] [-Confirm] 
A quick walk-through on the parameters and switches:
- Identity is the name or e-mail address of the mailbox.
- MessageClass specifies the Message Class to remove, for example IPM.Note.EnterpriseVault.Shortcut (EnterpriseVault). You can use wildcards around or at the end to include folders containing or starting with this string, e.g. ‘IPM.ixos*’ or ‘*EnterpriseVault*’. Matching is always case-insensitive.
- Server is the name of the Client Access Server to access for Exchange Web Services. When omitted, the script will attempt to use Autodiscover.
- Switch Impersonation specifies if impersonation will be used for mailbox access, otherwise the current user context will be used.
- DeleteMode specifies how to remove messages. Possible values are HardDelete (permanently deleted), SoftDelete (use dumpster, default) or MoveToDeletedItems (move to Deleted Items folder). Note that the Deleted Items folder will be processed, unless MoveToDeletedItems is used.
- Credentials specifies the user credentials to use.
- Before can be used to only remove items received before specified date.
- MailboxOnly specifies you only want to process the primary mailbox of specified users. You als need to use this parameter when running against mailboxes on Exchange Server 2007.
- ArchiveOnly specifies you only want to process personal archives of specified users.
- IncludeFolders specifies one or more names of folder(s) to include, e.g. ‘Projects’. You can use wildcards around of at the end to include folders containing or starting with this string, e.g. ‘Projects*’ or ‘*Project*’. Matching is always case-insensitive. You can also well-known folders, by using this format: #WellKnownFolderName#, e.g. #Inbox#. Supported are Calendar, Contacts, Inbox, Notes, SentItems, and Tasks.
- ExcludeFolders specifies one or more folder(s) to exclude. Usage of wildcards and well-known folders identical to IncludeFolder.
So for example, suppose you want to remove IPM.Note.EnterpriseVault.Shortcut items from the mailbox of user1 and personal archive when enabled, moving the items to the DeletedItems by Impersonation. In such case, you could use the following cmdlet:
Remove-MessageClassItems.ps1 -Identity user1 -MessageClass IPM.Note.EnterpriseVault.Shortcut -DeleteMode MoveToDeletedItems -Impersonation –Verbose
Note: Screenshot shows Mailbox parameter, which is per 1.52 renamed to Identity
Note: By default, Remove-MessageClassItems will only process IPF.Note class folders (i.e. containing mail items), so you’ll only see those being processed. If you want all folders scanned (also classless), use the ScanAllFolders switch.
The script also supports Office 365. For example, to remove all items with ‘Enterprise’ in their message class text, received before 1/1/2014, only from the primary mailbox, excluding the folder Personal, you can use:
$Credentials= Get-Credential Remove-MessageClassItems.ps1 -Identity email@example.com -DeleteMode MoveToDeletedItems -MessageClass *EnterpriseVault* -Before 1/1/2014 -MailboxOnly -ExcludeFolder Personal -Credentials $Credentials
In case you want to process multiple mailboxes, you can use a CSV file which needs to contain the Mailbox field. An example of how the CSV could look:
Identity francis philip
The cmdlet could then be something like:
Import-CSV users.csv1 | Remove-MessageClassItems.ps1 -MessageClass IPM.Note.EnterpriseVault.Shortcut -DeleteMode HardDelete -Impersonation
You’re feedback is welcomed through the comments; if you got scripting suggestions, please use the contact form.
You can download the script from the Technet Gallery here.
See TechNet Gallery page.