Microsoft has released an update for Microsoft Office Professional Plus 2013 Preview. This update resolves an issue in which email messages are deleted unexpectedly from the Microsoft Exchange server when Microsoft Outlook 2013 Preview is in online mode. Nothing is recoverable through the Recover Deleted Items option.
To install the hotfix, follow one of the links below, depending on your architecture:
Download the 64-bit version package now.
Download the 32-bit version package now.