# Ingest PST Files

Consider the following points before ingesting Microsoft Outlook Personal Folders (PST) files:

- The best results are usually obtained when KeyView uses MAPI to extract and filter PST files. To use MAPI, you must:

  - Run CFS on Windows.
  - Install Microsoft Outlook on the same machine as CFS. If you are using 64-bit CFS, install 64-bit Outlook. If you are using 32-bit CFS, install 32-bit Outlook.
  - Ensure that MAPI has write access to the PST files. Set the `WorkingDirectory` parameter in the `[ImportService]` section of the CFS configuration file so that CFS copies files to a working directory and processes the copies, rather than processing the files in their original location.
- PST files can contain a large amount of data and KeyView might not finish processing them within the default time limit allowed by CFS. Consider increasing the value of the `KeyviewTimeout` parameter, in the `[ImportService]` section of the CFS configuration file.

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