The Identification and Reconciliation Engine (IRE) is a core platform capability responsible for managing data consistency in the CMDB. It processes incoming data from various sources and uses reconciliation rules to prevent data duplication and maintain data integrity. While the Multisource CMDB feature (part of ITOM licensing) provides an enhanced user interface and specific features for managing source data, the underlying IRE functionality to apply reconciliation rules across multiple discovery sources is available without this specific license. Therefore, the Data Owner can configure and use IRE reconciliation rules for their five discovery sources on the base platform.

A. ITOM Discovery is not a mandatory prerequisite for using the IRE with multiple sources; IRE is a core CMDB function.

C. Multisource CMDB is not a base platform product; it requires a specific subscription, such as ITOM Visibility or Discovery, to be activated and used.

- ServiceNow Product Documentation, "CMDB Identification and Reconciliation," Doc ID: f268315553c3330034443754911c08e3. This document describes the IRE as a core CMDB feature for processing data from different sources.

- ServiceNow Product Documentation, "Multisource CMDB," Doc ID: 060a21115303330034443754911c08d3. This page notes that Multisource CMDB stores the entire history of discovery sources, a feature that requires specific licensing, but it doesn't state that the base IRE reconciliation is locked behind it.