Can I migrate multiple OST files into Office 365 at the same time?

[Robertparkar]

Yes, multiple OST files can be migrated to Office 365 in a single process using the MailsDaddy OST to Office 365 Migration Tool. This feature is especially useful for organizations, administrators, and users handling multiple mailboxes. Instead of importing each OST file individually, the software enables bulk migration to reduce manual effort and save time. During the migration process, all mailbox components including emails, contacts, calendars, attachments, and folders remain intact. The software also maintains mailbox structure and helps ensure accurate data transfer without affecting mailbox organization.

[sjax]

If you need to migrate multiple OST files into Office 365 (https://www.macmister.com/blog/move-ost-file-to-office-365-on-mac/) at the same time on macOS, you should consider using the MacMister OST Converter for Mac Tool (https://www.macmister.com/ost/). It is an automated tool that allows you to convert OST files into various file formats and email clients. It has a user-friendly interface that makes it easy for anyone to use. You can download the free demo copy to test its accuracy, which allows you to export the first 25 items per folder for free.