General Options

The General section contains general classification engine settings. By default, only standard options display. To view advanced options, click the wrench icon at Settings in the bottom-right corner.

Each option has an associated information popup (the “i” symbol next to the option name) which describes what the setting does and how it works.

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To view a complete list of the Config settings for your NDC instance, click the Details tab. The list indicates whether a setting differs from the default value.

General Options

Option	Description	Comment
Standard settings
Max Categories	Sets the maximum number of classifications to allocate to each document: up to 256 — for 32-bit Windows up to 1024 — for 64-bit Windows	If a document matches enough categories to exceed the specified maximum, the classification service selects the required number of categories based on those with the highest score. NOTE: Higher limits cause the classifier engine to use more RAM, so Netwrix recommends using the default setting (unless you must allocate more categories to each document).
Retain Existing Metadata Mode	Specifies how the classification engine processes documents with existing classifications (managed metadata fields). Possible options: Retain if not classified — leave existing classification in place if the product generated no auto-classification Overwrite — clear managed metadata fields	Applies to SharePoint source.
Auto-Classification Change Logs	Enables a change log for auto-classification: the database stores each "Addition"/"Removal" of a classification against a document as its classifications change.	Inactive by default. See also Manage Reports
Classifier Threads	The number of background threads the Classifier uses for classification. Default is 0 (auto).	Netwrix recommends leaving this setting on its default value. See the Knowledge Base article Classifier and Write Thread Tuning for details on tuning thread counts.
Classifier Write Threads	The number of threads the Classifier uses to update source systems during "tagging" operations (i.e. writing classifications back to source systems).	You can consider each thread a "user" when considering load on the source system. See the Knowledge Base article Classifier and Write Thread Tuning for details on tuning write thread counts.
Advanced settings
Classifier Enabled	Enables / disables the Classifier core component. By default, it is enabled.
SharePoint EMM No Classify Mode	Possible values: Don't update Deprecated (default) — use if you don't want to alter the Deprecated setting in SharePoint EMM Update Deprecated — select if you want Deprecated setting to be updated
Subset Trimming Enabled	This setting applies where both primary (single value) and secondary (multi value) fields are added to a document library for the same taxonomy. Off (default) — the highest scoring term appears in both primary and secondary fields. On — the highest scoring term appears only in the primary field.
Subset Trimming Threshold	If Subset Trimming Enabled option is ON, this parameter defines the minimum score required to class the highest scoring term as primary.	If no item has a score higher than this threshold, all terms show as secondary terms, and the primary term remains empty.
Classifier Delay	The sleep time (in milliseconds) between intensive operations, such as storing classification. Default is 1 ms.
Regular Taxonomy Backup Frequency	Enables and specifies the frequency of an automated process to create and store a backup of the taxonomy definitions. You can specify how often the product backs up the taxonomies — daily or weekly.	By default, this option is disabled.
Regular Taxonomy Backup Retention	Specifies the length of time to retain automated taxonomy backups (automatic cleanup configuration). If you selected to back up the taxonomies, you can specify backup retention (in weeks).