To convert MBOX to Office 365 (O365) effortlessly and directly you'll need to use a professional tool like the Softaken MBOX to Office 365 Migration Tool. Whether you're a tech expert or a first-time user the tool is designed to be simple to use with features like date filtering. Migrating or converting MBOX files to Office 365 is quick and simple because of its user-friendly interface. The free demo version lets you convert a few emails for free.