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Microsoft Exchange 2010 – Dumpster

Dumpster is essentially a view stored per folder.  Items in the dumpster  stay in the folder where they were soft-deleted (shift-delete or delete from Deleted Items) and are stamped with the ptagDeletedOnFlag flag.  These items are special-cased in the store to be excluded from normal Outlook views and quotas.  In addition, data with this flag cannot be searched or indexed. 

Key architectural changes in Exchange 2010 must meet these requirements

  • Exchange has to ensure that dumpster data moves with the mailbox.
  • Dumpster data must be indexed and discoverable.
  • Dumpster must have a quota.
  • Exchange has to prevent purging of data from dumpster.
  • Exchange has to track edits of certain content.
  • Dumpster should be per mailbox and not per folder.

To facilitate these requirements, Dumpster was re-architected, Dumpster 2.0 is no longer simply a view…Dumpster in Exchange 2010 is implemented as a folder called the Recoverable Items and is located within the Non-IPM subtree of the user’s mailbox (note that this is a hidden section of the mailbox and is not exposed to the end user through any client interface).  The folder has three sub-folders:

  1. Deletions
  2. Versions
  3. Purges

Dumpster data is now indexed and discoverable,  can now be moved with the mailbox, and is now stored on a per-mailbox basis rather than a per folder basis. Exchange 2010 includes capability for each mailbox to also maintain an archive mailbox as well.  There is a dumpster for both the primary mailbox and the archive mailbox. Data deleted in the primary mailbox is placed in the primary mailbox dumpster, while data deleted in the archive mailbox is placed in the archive mailbox dumpster. Unlike previous exchange server, Exchange 2010 automatically purges items from dumpster 14 days by default and 120 days for calendar can set this up..

Exchange 2010 includes the ability to ensure that data within the mailbox is preserved for a period of time…short term or long term.  This feature can be enabled enabled on a per mailbox basis by running the following cmdlet:  Set-Mailbox <identity> -SingleItemRecoveryEnabled $true

February 14, 2010 - Posted by | Exchange server 2010, Microsoft, Software | ,

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