If you want to migrate OST files to PST files So you can use
OST to PST Converter Software that is easy to move multiple OST files into Outlook PST files format like this OST to EML, OST to MSG, OST to MBOX, OST to EMLX, etc. By using this Software is easily convert OST files to MSG files without losing any data. This software supports all the latest versions of Windows such as Windows 10, 8, 7 XP, Vista, etc.