@davidwilliamson
I am David Wiiliamson work as a software engineer at MacProtools. We develop premium products for Mac users and we also offer a wide range of DIY Commercial, Shareware, and Freeware Utility Software that helps Businesses, Enterprises, and SMEs to Migrate, Backup, and Convert Data on a Mac Operating System. We have a great tool to backup Office 365 mailbox items to 15+ different formats and email clients. You can download our Office 365 Backup Tool for Mac.