OST to PST Converter

The OST to PST converter processes Outlook data by converting OST files into PST archives for portability, migration, or backup. It targets IT admins, MSPs, and power users who manage offline mailbox data or need to recover data after OST corruption or profile changes. The tool operates on a local copy of the OST and outputs a PST that can be opened by Outlook across versions. It preserves folder hierarchies, item metadata, attachments, and timestamps, enabling seamless data continuity during migration or archival.
Conceptually, the workflow reads the OST metadata and mailbox items, maps them to a PST-compatible structure, and writes a new PST while validating item counts and data integrity. It supports selective export by data type (emails, contacts, calendar, tasks, notes) and optional PST splitting to manage large archives. The solution minimizes downtime by allowing batch processing of multiple OST files and generating a concise export report.
Audience includes enterprises performing user migrations, help desks restoring access to offline data, and MSPs delivering archival services. The unique value lies in maintaining a consistent, standards-based PST output with optional attachments preservation, incremental processing, and a transparent export log, all without requiring server-side tools. Typical use cases include retrieving emails from a stolen or corrupted OST, consolidating offline data into a centralized PST library, or creating portable backups for users who frequently transition between Outlook profiles.
Core features include OST input validation, customizable export scopes, optional PST splitting, attachment preservation, and export validation. This makes the tool suitable for forensic recovery, compliance readiness, and disaster recovery planning.