To download your Office 365 mailbox data locally, you can use a tool like SysInfo Office 365 Backup Software. First, install the software on your computer. Once it's up and running, sign in with your Office 365 credentials. The tool will connect to your Office 365 account and display all your mailbox folders in a structured view. You can then choose which data you want to back up, such as emails, contacts, calendars, and more. After selecting the desired data, pick your preferred file format, like PST, PDF, or MBOX, and choose a destination folder on your computer. Finally, click "Backup," and the software will begin downloading your mailbox data to your local drive. This process helps you create a backup of your important information that you can access anytime.
Read more: https://www.sysinfotools.com/office365-backup.php