Migrating multiple OST files manually can consume a lot of time and increase the chances of errors. The MailsDaddy OST to Office 365 Migration Tool offers bulk migration capability that allows users to transfer multiple OST files into Office 365 mailboxes in a single operation. The software maintains mailbox properties, preserves original folder hierarchy, and ensures data remains accurate during migration. This feature is especially useful for businesses and administrators managing large-scale mailbox migration projects.