An Update for Microsoft Outlook 2013 Preview (KB2737132) (32 bit and 64 bit) is now available to download.
Brief Description
Microsoft has released an update for Office 2013 Professional Plus (Preview). This update addresses an issue in Outlook related to the unintentional deletion of mails from the Exchange Server. All users who are running the Office 2013 Professional Plus (Preview) version of Outlook should install this patch.
Overview
You can get specific information about this update in the Microsoft Knowledge Base article Update for Microsoft Outlook 2013 Preview (KB2737132).