You must follow the steps given below in order to migrate an MBOX File to MS Outlook:- Download Mac MBOX Migration Tool on your Mac Machine. Add the MBOX File that you want to export to Outlook. Now select Outlook as the File Format in which you want to export MBOX File. Enter the Credentials of your Outlook account in which the MBOX file has to be migrated. Finally click on the Export button to export all the emails of the MBOX files to Outlook.