How to Efficiently Convert OST file to PST?

Many times users want to Move Emails From OST To PST. There are various factors to convert OST file to PST file. The reasons are backing up OST files, securing files when exchange server crashes, etc. But they can't find a way to convert OST file to PST. If you are also looking for ways for OST PST conversion, then read further. This post contains three manual approaches with easy-to-follow steps. It also includes a third-party utility to Export OST to PST effortlessly.