We have developed an application which can help you organize Microsoft Outlook folders. It's called “Yearly Message Filling”. It scans your Outlook folders and categorizes the emails by year or year/month under new folders. They are named after the year or the year/month the emails were created. The end result is that emails are distributed under multiple folders that are not overcrowded with messages.
We have a free version which you can try. Google: Synergy USA llc Yearly Message Filing
