If you are looking for the best backup tool to back up Office 365 data, I would recommend the MacSonik Office 365 backup Tool. This utility can export Office 365 data into various file formats such as PST, PDF, MSG, MBOX, and more. Also, this tool can migrate your data from Office 365 to IMAP, G Suite, or Google Workspace, and many other email clients. Additionally, this software is compatible with both Mac OS and Windows OS.

Read more: Export Office 365 to MBOX