MailsDaddy Office 365 Backup Tool is an awesome application that easily takes backup of Office 365 account into PST format. Users can take a backup of multiple accounts with an admin account. It has the option to download complete data including emails, contacts, tasks, etc. This software helps users to take a backup of O365 into multiple file formats like PST, MBOX, MSG, and EML. The extracted PST is compatible with all the Microsoft Outlook versions including Outlook 2019, 2016, 2013, 2010, and all the older versions. There is a data filter option according to different ranges. Also, an additional feature of this software is that users can export only contacts and calendars in multiple file formats.