In this post, I would like to suggest you to use OST to PST Converter by SysTools to convert OST file to PST file. It's the best solution to convert OST to PST Outlook without configuring Exchange environment.
Software perform the following tasks;
1). Convert OST file in different file format
2). Repair majorly corrupt OST file
3). Does not require Outlook installation
4). Maintains Original formatting of OST email
5). Provide option to export selective email