Outlook 2010 – Lost folder content

In order to tidy up my Microsoft Exchange 2007 Outlook Web Access inbox:

1. I connected the account to my Outlook 2010.
2. In Outlook 2010, I created a folder called 2012 Inbox.
3. Using Outlook 2010, I moved last year's received emails from my Inbox to my 2012 Inbox.

The resulting problem:

• In my Outlook 2010, my 2012 Inbox is empty and I cannot find the emails from 2012 in my regular Inbox either.
• In my Microsoft Exchange 2007 Outlook Web Access, my 2012 Inbox is also empty and I cannot find the emails from 2012 in my regular Inbox either.
• I don't think that the emails have been purged because my Microsoft Exchange 2007 Outlook Web Access account still shows a message - "1.96 GB of mailbox space used."
  

Where are my 2012 emails?