vMail OST to PST Converter can convert your data into various formats like PST, EML, EMLX, MBOX, vCal, MSG, vCard, Office 365 & Live Exchange Server. You are free to convert the data of any size for free. OST to PST Converter provides the demo version of this software, you can convert 30 emails with respective ‘subject’, ‘to’, ‘cc’, ‘bcc’, ‘date’ and ‘time’