Users often delete data from their mailboxes that they later want recovered. Recovery of these deleted items is the most common reason for IT admins to recover data from traditional point-in-time backups today. With previous versions administrators implemented ‘dumpster and restores’ to enable single item recovery. Exchange 2010 aims to reduce the complexity and administrative costs associated with single item recovery. The following definitions may be useful for understanding content of this article:
- Store Soft Delete - when an item has been deleted from the Deleted Items folder and placed within dumpster.
- Store Hard Delete - when an item has been marked for purging out of the store.
- Hard Delete via Outlook (Shift-Delete) - when the end user performs a shift-delete on an item. This results in the item bypassing the deleted items folder and being directly placed in dumpster.
Full Article: Exchange blog