Support for PST Files

What's New

Harvey now supports direct .pst file uploads in both Vault and Assistant conversations. Once uploaded, Harvey will automatically extract and index every email in the PST archive, preserving Outlook folder structures and processing attachments (including ZIP files).

Why it Matters

Legal teams routinely receive client email archives as .pst file exports for investigations, discovery, due diligence, and internal reviews. With native PST support, lawyers can drop an archive directly into Vault or an Assistant conversation and immediately work across thousands of emails without any preprocessing. This eliminates a common bottleneck in matters where time-sensitive access to complete email history is critical.

How to Use

In Vault:

1. Navigate to the relevant Vault project and upload your .pst file as you would any other document.
2. After uploading, Harvey will automatically extract all emails in the background. This may take a few seconds to several minutes depending on archive size.
3. Once extraction is complete, a new subfolder will appear named after your PST file, containing each email as an individual file.
4. The extracted emails are now ready to query. The original .pst file remains in your folder for reference but is not queryable.

In Assistant:

1. Upload your .pst file directly into an Assistant conversation.
2. Harvey will extract and process the emails in the background.
3. Once processing is complete, the original .pst file will be replaced by the extracted emails, which you can query across immediately.

Notes & Limitations

• Email attachments are preserved and extracted automatically, including the contents of any ZIP files.
• Extracted emails count toward your Vault project's file limit. If the limit would be exceeded, extraction is skipped entirely.
• Harvey supports .pst files up to 4 GB.