Processing large mailbox archives one file at a time creates unnecessary delays when the actual requirement is to import bulk OLM files to Office 365 in a single operation. The SysInfo OLM to Office 365 Migration Tool supports batch file mode, allowing multiple OLM files to be added simultaneously and migrated together to the Office 365 account without any file size restrictions—even files running into gigabytes are handled without interruption. The duplicate removal feature is particularly useful in bulk migration scenarios, identifying and eliminating repeated emails based on parameters like To, From, Subject, and Body before the transfer completes, keeping the destination mailbox clean and storage-efficient. Folder hierarchy is preserved across all loaded files, ensuring that the organizational structure of each OLM mailbox carries over intact to the Office 365 account. The option to migrate emails without attachments is also available through a built-in toggle, which helps reduce transfer size when attachment data is not required at the destination. Compatible with all versions of Windows and Mac OS, with a free demo version available to evaluate performance before committing to the full migration.
Read more: https://www.sysinfotools.com/olm-to-office-365-migration-tool.php