The most effective method for importing PST files, along with their attachments, into Office 365 is by utilizing the OSTtoPSTAPP PST to Office 365 Migration Tool. This utility is a top choice for seamlessly importing PST files into Microsoft 365 without the need for Outlook. This tool has been designed with advanced features to securely import multiple PST files to Office 365 accounts in bulk. The software preserves data integrity and the original folder structure during the conversion process.
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