Lost emails with Outlook change, now losing more.

Initially, I lost all emails in the Inbox folder prior to March 2013, with the forced change to Outlook.

I've dealt with this and my intense frustration with the issue.

Now, I've again lost all emails in the Inbox folder prior to May 6, 2013.

This is completely unacceptable.

I've looked everywhere to determine if there is an auto-archive feature on or something.

This has nothing to do with Conversation or Grouping, I don't use those.

Even the Deleted Messages folder didn't go back further than May 6.

I cannot afford to keep losing emails, what on earth am I doing wrong

(other than not keeping 800 folders to sort every single email that comes in)?!

Question about Outlook Express