If you are searching for an easy method to export Office 365 emails to PDF format, then you can try the EmailProHelp Office 365 Backup Tool. It exports Office 365 mailbox data in PST, PDF, CSV, EML, XLS, CSV, DOC, JPG, and other file formats. This tool migrates Office 365 data into Gmail, G Suite, IMAP, and other clients besides Tenant-To-Tenant migration. It also protects data from all forms of threats and provides accuracy. Moreover, it includes several features like a date range filter, a preview option, and the ability to remove duplicate emails. It is compatible with all versions of Windows OS.

More Info: https://www.emailprohelp.com/office365-backup.html