Do you want to convert OST mailbox components to more than one format? If yes so I would like to suggest the best third-party tool that is ATS OST to PST Converter tool which has the ability to handle all kind of issues and convert the data into PST and other file formats that are EML, MSG, HTML, EMLX, MBOX, vCal, vCard. Using it you can directly export your data into cloud-based application Office365 & Live Exchange Server. You can see the preview of recovered mailbox before the conversion with the aid of this tool. The user can download its free demo version which allows you to convert 30 emails.