Stellar Migrator: Bulk PST to Office 365

Key insights

• Stellar Migrator for Outlook automates large-scale PST imports into Office 365, letting admins map PST files to Primary, Archive or Public Folder mailboxes without scripting.
  It supports filters, parallel processing, and incremental runs so you avoid duplicate items and reprocessing.
• Microsoft Purview PST import is Microsoft’s native bulk path: admins create a job, upload or stage PSTs, supply a mapping file, and start the import.
  Purview offers two upload options: network upload (AzCopy + SAS) or drive shipping (encrypted drives) for very large or low-bandwidth migrations.
• Key differences: third-party tools focus on automation, fine-grained mapping, and ease of use; Purview is the Microsoft-supported admin workflow for bulk imports.
  The Outlook import wizard still works for single-mailbox PST imports but is not suited for mass migration.
• CSV mapping and job setup: both approaches rely on a mapping file to assign PSTs to target mailboxes.
  Stellar and Purview let you filter by date or folders before importing and review settings prior to launch.
• Best use cases: choose Purview when you want Microsoft-supported, enterprise-scale import with built-in security controls; choose a migrator when you need faster setup, job automation, resume capability, or richer mailbox/folder mapping.
  For single users, use the Outlook import wizard for a quick local import.
• Security and performance: Purview’s drive shipping uses encrypted drives, and network uploads use SAS tokens for storage access.
  On any solution, tune parallel-processing and incremental settings to balance speed with network and server load.

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