EdbMails will display all the mailboxes/ users from your Office 365 tenant during PST to Office 365 migration operation. You can map your PST mailbox to Office 365 user account easily and even apply include/exclude email filters.
Some of the salient features of EdbMails PST to Office 365 Migration tool include:
Truly secure Migration of all PST file data
Reliable Outlook PST to Office 365 migration
Incremental PST migration to ensure there are no duplicates
Brick level migration that allows you to migrate individual items of your choice from mailbox/folders
Capable of recovering unintentionally deleted items
No Outlook dependency