As we know, nowadays many solutions are available on the web which lets the users import PST files into Office 365 (Microsoft 365). You can use any of them to accomplish your work. But before going with any tool, I would recommend you try a free version of Shoviv PST to Office 365 Migration tool. Its effective features and easy-to-use GUI (Graphic User Interface) make this tool the user’s first choice and popular. It has a de version as well.
Read in Detail: Import PST to Office 365