As it is already proved that manual process does not work with MS Outlook 2010 and upper editions, it only supports 2007 and older versions of Outlook, so it is highly advised to users to use the third-party SysInspire OST to PST Converter software to open OST files in MS Outlook. It helps to export all items from an OST file into PST format, and then it can be easily opened in any Outlook account. It also helps the users to convert OST to PST in Outlook 2016, 2013, and other lower versions. Just a few methods are to be followed like downloading and then installing the eSoftTools application. Then after opening, move further accordingly to the instructions given. After completion of all the steps, you can suitably open the OST file in MS Outlook 2016.
More info:- Convert OST to PST in Outlook 2016
Run Outlook. ...In account setting from the email tab and click on Microsoft exchange.Select more settings.From Microsoft exchange Window, click on “Advanced”.Go to offline folder file setting.Write path of OST file in the file field.Click ok.