Compliance: EXCERPT from Microsoft® Exchange Server 2013 Inside Out

The value of the Recoverable Items structure

Given the discussion so far about retention and the importance of immutability in achieving compliance, it’s possible for users to attempt, probably inadvertently, to remove data required to meet regulations or some other control by deleting items from their mailboxes. This is why Exchange contains the Recoverable Items structure to hold deleted items and other information that needs to be retained. Items are moved into the structure when a user deletes them, when the MFA executes the Delete And Allow Recovery action for items when their retention period expires, or when Exchange needs to retain an item as the result of an in-place hold. Previous versions of the Recoverable Items structure were known ...