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Here one solution is best to convert the OST file into PST file that name is SysInspire OST to PST Converter Software. The functionally of this software is it convert ost to pst in outlook 2016 file into various file formats like EML, EMLX, HTML, MSG, vCard, VCF and office365, etc. It also performs the conversion process of OST file in absence of MS Outlook application and it also split OST file into multiple PST file within minutes. With the conversion of the OST file as well it converts its exact properties and file attachment.

Top offers at SysInspire - Free OST to PST Converter Software for Free OST Recovery
OST to PST Converter is the perfect solution ever to recover the OST file by converting it into Outlook PST format in a secure manner. This tool has the facility to export all emails, contacts, calendars, deleted items, the large file size of OST and converting them to PST file format. With this OST to PST Converter, you can see all data of OST file with a smart preview function. It supports all versions MS Outlook 95 up to 2019 and Windows versions up to 10 (32-bit & 64-bit).