Article ID: 246153
Article Last Modified on 1/25/2007
APPLIES TO
- Microsoft Exchange Server 5.5 Standard Edition
- Microsoft Outlook 97 Service Pack 1
- Microsoft Outlook 97 Service Pack 1
- Microsoft Outlook 97 Standard Edition
- Microsoft Outlook 98 Standard Edition
- Microsoft Outlook 2000 Standard Edition
- Microsoft Outlook 2002 Standard Edition
- Microsoft Office Outlook 2003
This article was previously published under Q246153
Important This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows Registry
SUMMARY
This article describes how to recover items that have been "hard deleted"; for example, if you do not move items to the Deleted Items folder before you delete them, these items have been hard deleted.
MORE INFORMATION
Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
When you delete items from a folder in a mailbox, the items first are shifted to the Deleted Items folder in the mailbox. You can then delete these items from the Deleted Items folder. This functionality protects you from accidentally deleting an item. After you delete the items from the Deleted Items folder, these items can still be recovered if the Exchange Server 5.5 computer has been configured to retain deleted items. To determine if the server has been configured in this manner, open the properties of the public and private information store objects under the Server object.
For additional information, click the following article number about how to configure the server to retain deleted items to view the article about how to configure the server to retain deleted items in the Microsoft Knowledge Base:
246283 Set deleted mail message retention time in Exchange Server 5.5
It is also possible to permanently delete items without first moving them to the Deleted Items folder. This procedure is called a "hard delete" as opposed to a "soft delete".
Messages are hard deleted in the following scenarios:
- You are using Microsoft Outlook, and you press SHIFT+DELETE to delete a message.
- You are working an Internet Message Access Protocol 4 (IMAP4) client or another type of client that does not first move the message to the Deleted Items folder.
By default, the Recover Deleted Items functionality is only enabled on the Deleted Items folder in a user's private folders; items that are hard deleted cannot be recovered. To enable the Recover Deleted Items functionality on mail folders other than Deleted Items (for example, for Sent Items, Drafts, Outbox and Inbox folders), you must make the following changes to the registry:
- Start Registry Editor (Regedt32.exe).
- Locate and click the following key in the registry:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Exchange\Client\Options
- On the Edit menu, click Add Value, and then add the following registry value:
Value name: DumpsterAlwaysOn
Data type: DWORD
Value data: 1 - Quit Registry Editor.
You can use an administrator's computer or a user's computer to make this change to the registry. After you change the registry, start Outlook, and then click Deleted Item Recovery on the Tools menu. A list of items that have been hard deleted during the retention time set on the server is displayed.
If you are an administrator, you can set this functionality for all user workstations. To do so, use your computer to change the registry for all user workstations, and then open the affected user's mailbox as an additional mailbox. You can then recover deleted items from the user's mailbox mail folders.
Note If you are an administrator, and you want to open another user's mailbox to recover items in the user's private folders, your Windows NT account must have User permissions for that user's mailbox object. You must also add that user's mailbox to your own profile:
- Open Control Panel, and then double-click Mail.
- Open the Services properties, and then double-click Microsoft Exchange Server.
- Click the Advanced tab, and then click Add to add the mailbox to your profile.
The Recover Deleted Items functionality in Outlook 98, Outlook 2000, Outlook 2002
In Outlook 98, the Recover Deleted Items functionality is available only for mail folders (for example, Deleted Items, Drafts, Inbox, Outbox and Sent Items folders). Therefore, items that are hard-deleted from non-mail folders (for example, Contacts and Notes folders) cannot be recovered. However, in Outlook 2000 and Outlook 2002, the Recover Deleted Items functionality is available for all folders; if you make the registry change described earlier in this article, you can recover hard-deleted items from non-mail folders.
For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
228934 Understanding Deleted Item Recovery
175263 Clients cannot recover items after Item Recovery is enabled
188637 XADM: How to Determine the Size of Recoverable Items in the Information Store
178630 How to use Exchange Server 5.5 or Exchange 2000 Server to recover items that are not first transferred to the Deleted Items folder in Outlook
Additional query words: Dumpster
Keywords: kbhowto kbenv kbfile KB246153
