Folder now only shows emails going back one month.

I keep all my important emails in a Folder called Saved......100's of them.  Now my Saved folder only shows

emails going back one month.  I obviously can't search and recover them one at a time. I have deleted all "rules" and tried a few other things, but no luck.  I do have an Outlook 2010, that I open occasionally to sync and backup my online emails, in case something like this happens..because it has happened before. 

Thanks.