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## Data Loss Prevention: Hidden Keys

You can configure Data Loss Prevention through use of the following hidden keys.

#### Hidden Keys Used in Data Loss Prevention Configuration

Name | Type | Description
--- | --- | ---
EmMaxEntitySize | REG_DWORD | Use this key to customize the bypassing attachment size for Data Loss Prevention scans. The hidden key indicates the file scan threshold in megabytes.
DmcDisableMask | String | Use this key to bypass the scanning of specified file types. By default, Data Loss Prevention scans all files types. The hidden key allows you to choose file types not to scan. This applies to all scan types.

| ##### Note Hidden keys will take effect after you restart the ScanMail main service. See Starting and Stopping the Services.