You can also use the third-party tool to upload PST into Office 365 Mailbox and there are many options available for you. I also recommended you to use this PST to Office 365 Migration Tool for converting PST file data like emails, contacts, calendars, appointments, and attachments etc. into Office 365 Exchange Online environment. All users both technical and non technical users can easily access this tool without any technical skill. because no technical skill required for this tool. moreover,It doesn’t need any technical knowledge how to install and it can be completed in 5 minutes. You just have to Add PST file, Office 365 account, map PST files to desired mailboxes and import PST files. Even if you don’t have Outlook installed, you can easily import PST files to Office 365 or Exchange.
Supports Data Type:- This utility converts all types of email data in one process of migration – Address Books, Messages, Tasks/To Do items, and Calendars.