You want to convert mbox to pst because you want to widely use your data in outlook. There are many mbox to pst converter available which claim best and reliable conversion. But before using any software you should use free demo version first which help you to choose the reliable one.

Here I'll suggest you MBOX to PST Converter which can easily export their data into several interesting file formats like PST, EML, MBOX, HTML, vCal, vCard, MSG and EMLX. By using this converter you can easily convert single or multiple mbox files into PST Format in few clicks.

Read more info:- http://www.tools4recovery.com/mbox-to-pst-converter.html