I had tried lots of solutions while performing the conversion of MBOX file into Outlook PST format, but after getting the output result, it seemed there was some problem in conversion file and I had lost some important content from it. Then after a deep search, I found a wondering tool which effectively convert all mailbox data of MBOX file to PST format and I am really satisfied the output result. I also suggest you go with this tool, but before purchasing tool check the demo version first.
You can easily search this advanced tool on Google just type convertmbox2pst.com.