A2Z Migrations for PST to Office 365 is a helpful and secure tool to upload the PST data into Exchange Online mailbox. The software is integrated with many good features. This application is designed in such a way that you do not require Microsoft PowerShell to import the PST data. With this software, the user can add the single PST and see the preview of the data including all attachments before migration.
It also provide the bulk export option with or without impersonation feature, by these features you can transfer your multiple PSTs into multiple accounts at a time. The software does not require any CSV for mapping mailboxes. You can manually type the Exchange Online Mailbox Id & Password and provide select the Mailbox type through the drop-down list.
The demo version is available to download that migrates first 20 items per folders for absolutely free. After evaluation, you can purchase the required license available at a reasonable price starting from $10.14/mailbox.
Note : As the number of mailboxes increases the total purchase amount will decrease.