To migrate Outlook PST files to Office 365 while preserving the folder structure, choose a migration method that maintains the original mailbox hierarchy. Start by backing up your PST files and checking that your Microsoft 365 account has the required permissions. The Cigati PST to Office 365 Migration Tool provides features to import PST files while retaining their folder hierarchy and mapping data to the appropriate Microsoft 365 mailboxes. It also supports bulk PST selection, CSV-based user mapping, email preview, and date range filtering to make migration more manageable. You can configure attachment handling and use duplicate detection to help organize the transferred data. During migration, ensure that each PST file is assigned to the correct destination mailbox. Once the process is complete, verify the folders, emails, attachments, contacts, and calendar items in Microsoft 365. These steps help maintain mailbox organization and reduce the risk of missing or misplaced data during the migration process.
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