Practically a PST file can be opened by outlook. But a pst file cannot be defined by Outlook 2016 or the other versions.
The user will always find an error to open a pst file by using Outlook.
So, here the most basic option is to import the OST file to Outlook.
SysInspire OST to PST converter software is the third party tool that simply within a few steps can convert OST files to PST.
● Download, install and operate SysInspire tool on your PC
● then Select “Convert OST”, now opt for “Browse” and select the OST file which desires to be converted.
● Click “Convert”.
● In just a few minutes, the OST file you have chosen will be exported to a PST file.