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• You can retrieve a message directly from your account's deleted items folder, unless you have performed a manual purge or the message has been in the folder for over 30 days, at which time it will be automatically purged.
• Once the message has been purged from your deleted items folder, you have an additional 14 days from the purge date to retrieve the message from the Exchange Dumpster (accessible via Outlook or OWA).

Restore a deleted message from the Exchange Dumpster using OWA | Outlook.

Note: This only will allow you to access the Items that were purged from your “Deleted Items” folder.