If you are also trying to open an OST file in Outlook like me, then you can also try
eSoftTool OST to PST Converter software by downloading it. Using this software, you can convert OST files to PST, EML, MSG, EMLX, HTML, NSF, and many other file. Apart from this, using this software, you can also open an OST file in any cloud-based platform like Gmail, Yahoo Mail, and Office 365. This tool solves 100% of the problems and opens the OST file in Outlook. Apart from this, you can also download it and try its free demo.
Read More:- Open an OST file to Outlook