One of the best ways to back up Gmail emails is by using the effective and reliable
Gmail Backup Tool. This utility provides you the best experience to export Gmail emails to PST, PDF, MBOX, EML, CSV, etc. Additionally, this utility helps you to migrate Gmail emails to Office 365, Yahoo, Thunderbird, AOL, and various other IMAP-supported email clients.
However, in case you are willing to switch over to a more secure cloud-based environment then you can go through this informative article that will help you to identify which approach is best suited for you to
migrate Gmail to Office 365. It explains the manual and a professional approach to accomplish this task. However, the manual method requires some basic technical knowledge of the Office 365 admin center. Therefore, experts have always recommended opting for a more secure and reliable professional approach.