03-31-2025, 01:49 PM
To back up an OST file to PST, you can manually export data via Outlook (File > Open & Export > Import/Export > 'Export to a PST file'), but this method only works with active Exchange accounts and may fail if the OST is corrupted. For a more reliable solution—especially for orphaned, corrupted, or bulk OST files—use the DRS softech OST to PST Converter Tool. It preserves all metadata, handles broken OST files, and converts multiple files at once without needing Outlook or Exchange access. This ensures a complete, error-free backup for migration or recovery purposes.