Email Discovery scans do not trigger a reaction on content when scanning OST files

Technical Articles ID: KB86571
Last Modified: 12/22/2021

Environment

McAfee Data Loss Prevention (DLP) Endpoint 11.x

For supported environments, see KB68147 - Supported platforms for Data Loss Prevention Endpoint.

Problem

After you configure an email discovery rule to scan Offline Storage Table (OST) files, the scan completes quickly on the client but does not trigger a reaction on the content. The HDLP_PST.log file, located in C:\Programdata\McAfee\DLP\Temp\Logs, shows the following error:

[OERROR] [PST OOP Crawler] [MAPIManager::isIgnoreMessageStore] OST is in Non Cached Exchange mode. Skipping...

Cause

Microsoft Outlook is not running in Cached Exchange Mode. OST files are not scanned if Cached Exchange Mode is not enabled.

Solution

Enable Cached Exchange Mode in Outlook, and then run the Email Discovery Scan to verify that it works as expected.

For instructions on enabling Cached Exchange Mode in Outlook, see the following Microsoft Support article: support.office.com/en-us/article/Turn-on-or-off-Cached-Exchange-Mode-e8966ca4-6ecd-4bdd-ade2-64993dda432b.

Affected Products

Data Loss Prevention Endpoint 11.6.x
Data Loss Prevention Endpoint 11.4.x (EOL)

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Knowledge Center

Email Discovery scans do not trigger a reaction on content when scanning OST files

Environment

Problem

Cause

Solution

Affected Products

Languages:

Glossary of Technical Terms

Title

Title

Knowledge Center

Email Discovery scans do not trigger a reaction on content when scanning OST files

Environment

Problem

Cause

Solution

Affected Products

Languages:

Glossary of Technical Terms

Choose your region

Title

Title