Empty Folders List in Outlook 2013 on Windows 7 & 8
If you got your computer recently updated, and have the list of folders blank (empty) inside Outlook 2013. Then most likely you have the issue explain in this article:
You may contact our support team for further details if you need.
Updated on 29 Sep 2013:
The issue is applicable to Windows 7 as well.
Microsoft have issued an update for Outlook 2013 to solve this issue. If the update is not installed automatically download it from here: