For the migration of Office 365 mailbox emails, using the Sysinfo Office 365 Email Backup Tool will be an excellent choice as it is termed as a 100% secure tool for the conversion of the Office mailbox emails into a local drive or the other Email clients, the software supports Outlook 2019, 2016, 2013 & earlier versions. The tool is competent enough to export all mailbox items like emails, contacts, calendars, and tasks into Gmail, AOL, IMAP, etc. Some other features of the tool are:

• Backup Office 365 Mailbox items like emails, attachments, contacts, calendars, tasks, notes, etc.
• Migrate Office 365 emails to other email clients.
• Shows an enhanced preview of the mailbox folders of the O365 account.
• It allows users to download Office 365 mailbox emails into 15+ file formats.