Successive Solution Outlook OST to PST for those who wants to repair their outlook OST File data, it is unique program that not only repair OST File but also convert OST File into existing outlook profile and new created PST File. outlook OST to PST Converter Software easily convert OST messages into EML, MSG, MHTML, RTF, MBOX and other formats also. During conversion, select PST Split option upto 5GB if you want. It allows opening OST File.