Checkout this awesome application to convert ost file to pst file. Here are some great features of this tool.
Easy to Use application.
Efficient to recover corrupt OST email file.
Convert ost to pst file easily.
Software support all the latest version of MS Outlook.
Exports password encrypted Outlook OST file to PST format.
You can download this application from here: emailsoftwares.com/ost-to-pst-converter.html