How can I undelete mail in Outlook?

A. When you delete an item from the Outlook client (and its been removed from the Deleted Items folder) it is actually kept on the Exchange server for a set amount of time (Exchange Server 5.5 and above only), obviously this only applies if the mail is from an Exchange server, if you use Outlook to download from POP3, IMAP etc this does not work. Mail and can be recovered as follows:

1. Start the Outlook client
2. Select the "Deleted Items folder"
3. Select "Recover Deleted Items" from the Tools menu
4. Select the message and click the "Recover selected message" button
5. Close the dialog
6. The message will be added to the "Deleted Items" folder

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To change the number of days Exchange stores deleted items for perform the following:

1. Start the Exchange Administrator Program (Start - Programs - Microsoft Exchange - Exchange Administrator Program)
2. Expand the Org, site, Configuration, Servers and select the server
3. Select Private Information Store and select Properties from the File menu
4. Select the General tab
5. Under "Item Recovery" select the number of days to keep deleted items for. You can also select to not delete items until the store has been backed up
6. Click OK
7. Close the Exchange Administrator Program