Use ToolsBaer MSG to MBOX Conversion, an efficient software program that allows you to convert Outlook MSG files into an MBOX format without losing the contents, attachments, or metadata. The utility is capable of performing a batch conversion of your MSG files to the MBOX format, so you don't have to convert them one at a time, and it does not require an installation of Microsoft Outlook. The tool is also user-friendly, with a Free Trial available for you to test out the different features before purchasing your copy.