Manual conversion of Outlook 2016 OST to PST file is not so reliable and not properly arranged. You may have to Open Outlook OST file in Outlook 2016 to a readable PST and third-party tools available online assists you to do the same with ease. One such is SysInspire OST to PST Converter.
Install and launch SysInspire OST to PST Converter tool after successful download to start with the conversion process
Click on 'Open OST File' if you know the correct location of the Outlook OST file else hit on 'Find OST File' option and search for Office 2016 OST file
After selecting the file click on the 'Convert' option
Now the application starts to convert the entire OST file to PST and displays a message after successful conversion
Finally, select the desired location to save new and healthy PST file
Read More - Open Outlook OST file in Outlook 2016
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