Now you can easily Migrate & Import PST files to Office 365 Account and Live Exchange Server with the help of this third party tool Regain PST to Office 365 Migration Application. you can easily Migrate your PST file data such as email, contacts, calendar, appointments, attachments, etc. to Office 365 Account. the software maintains the data folder structure during the PST to Office 365 Migration. Before you buy any software, I would like to suggest you to try this software trial version first.