To get a mailbox backup of Office 365, Use the Corbett Office 365 Backup Tool. It is a one-go solution to take a local backup of Office 365. In addition, this tool allows you to save your data in multiple formats such as EML, PDF, CSV, MBOX, PST, HTML, and Text. The user-friendly features of the software make the backup process very simple. Once you’ve created a backup, this software will generate a process report of the completion of data. The tool is available for all editions of Windows. The software also provides you a free demo version to check the backup process.