To export an OST file to pst in Outlook 2016 it is mandatory to follow the third party tool to export the databases from the OST file to a PST data file.
Now, the question is which automated tool is user friendly.
I had tried the manual method of Outlook import-export wizard but it had many terms and conditions and even wasted a lot of time.
This method also could not export one of my encrypted OST files. So, it was just a waste.
Then, one of my friends suggested that I should try SysInspire OST to PST converter software.
I was still hesitating but the demo version helped me a lot and even converted the OST file with all the database in it instantly.
I first downloaded the SysInspire software and opened the tool, and then searched for my OST file i.e. to be exported.
Then selected the convert option and then clicked on ok.
After that, I went to Outlook 2016, went to my file, opened it and exported the file and ultimately opened the exported pst file in Outlook 2016.
More info:- Export an OST file to pst in Outlook 2016