Run Kernel Import PST to Office 365 tool. Click Add button in Source Pane and choose OST/PST file as Source. Click Add button in Destination pane and type Office 365 credentials. Choose Single/Archive mailbox and Map the Source to Destination. Select amongst mailbox, archive mailbox, and public folders. Apply desired filters for migrating selective PST data items Click I am OK, Start Migration, save the log report once it is completed.

The following steps will quickly help you to migrate PST to Office 365 mailbox account:

Repeat the same process for bulk migration of PST files with administrator privileges.