You can also try MacMister Office 365 Backup Tool to securely backup Office 365 mailboxes into PST, PDF, MSG, EML, EMLx, MHT, HTML, DOC, G Suite, Yahoo, and more. The software has both Mac & Windows versions as well. The user-friendly interface is easy to manage. Moreover, the features are brilliant. They will help users to backup Office 365 mailboxes as per their requirements. However, a free demo is also available which is userful to analyze the entire backup process for free.
Know more – https://www.macmister.com/office-365-backup/