If you need to convert your Office 365 emails and data into MBOX files the appropriate tool can make the job easy and safe. You can use the BetaVare Cloud Backup Tool to export your Office 365 mailbox directly into MBOX format without changing the original contents. The software retains all of your emails, attachments and folder structures the same. Users can easily retrieve them in other email clients later. It is easy to use, works well on Windows. It can handle huge mailboxes without any problems. You can try it out for free before using it for backups or moving files.