This document provides guidance on migrating customer data from IS-U and CRM systems to SAP S/4HANA Utilities for customer engagement. It outlines several migration scenarios and describes how to migrate master data, contracts, and customizing settings. Key steps include loading business partner contacts to interaction records, configuring the interaction center, and migrating IS-U contracts using custom reports to create corresponding utilities sales contracts in S/4HANA. The document also discusses customizing options and a BAdI for customizing the integration process.