Importing of MBOX files to Outlook for PST files are easier if done with Mail Passport Lite. An advance migration tool used for converting your mail database from MBOX to PST files for Outlook. It convert each and every micro content of your mail database like mails, attachments, etc. It also have dual conversion specialization which allows you to convert EML files along with MBOX in a single tool. This is the tool one can rely upon as easy to use with its interface and self explanatory features and also come with a free trial version which allows you to experience migration before hand using this converter tool.

For details: mailpassportlite.com