What could be the best solution to this problem?

What could be the best solution to this problem?

Here’s an explanation on how things happened each time a message in the mailbox has been deleted. See if you can find your way around and somehow fix your problem. Permanently deleting a message or an email is also termed as “soft delete”. To do a soft delete, you can either delete an item from the Deleted Items folder, press the Shift + Delete buttons to delete any items, or empty the Deleted Items folder. The items in the mailbox that have been soft deleted are transferred to the Recoverable Items folder and into a subfolder called Deletions.

In earlier versions of Microsoft Exchange the Recoverable Items folder is called a “dumpster”. Even if the messages were already deleted, users can still recover the messages pushed to Deletions subfolder using Microsoft Office Outlook 2010. In this version of Microsoft Office Outlook, you can use the Recover Deleted Items feature to recover the messages in the Deletions subfolder. If the user purged the email message from the Recoverable Items folder, the message will then be shifted to the Purges subfolder. Purging a message is also called “hard delete”.

When a message has been purged, the user can no longer access and recover it. Purged items can only be recovered by an administrator. Administrators can use Multi-Mailbox Search to search for any purged items because purged items in the Purges subfolder inside the Recoverable Items folder are indexed and discoverable. The retention period for any deleted item is only 14 days and it starts the moment the deleted item is transferred to the Deletions subfolder.