For fast migration PST to Office 365, you should try a Regain PST to Office 365 Migration tool. This powerful tool enables hassle-free migration of all PST items, including emails, attachments, tasks, calendars, and notes, to Office 365 mailboxes. It supports migrating multiple PST files simultaneously, without size limitations, and ensures precise mailbox mapping. The tool maintains folder hierarchy and meta-properties during the transfer, ensuring data integrity. It's also compatible with Exchange Server and supports all versions of Microsoft Outlook and Windows OS. You can evaluate its features with the demo version before purchase.

More Info Click Here:- How to Import PST to Office 365- Complete Step by Step Guide