One of the more obscure parts of Exchange Server is the Dumpster. This allows the recovery of one or more deleted emails, in much the same way as the recycle bin in Windows, even if the user has purged them. Although it is seen as an alternative to backup, or as a means to document retention, it really provides a separate function, undoing an accidental deletion. Elie explains how to configure deleted retention items and how to recover a purged item.