Which app is used to extend the existing organizational units in SAP?

The application that is used to extend the existing organizational units in SAP is indeed referring to the ability to manage and configure the entire solution, including the organizational structures. "Manage your solution" provides a comprehensive environment where users can define and modify existing organizational units such as company codes, cost centers, and other fundamental components of the organizational hierarchy in SAP.

This application allows users to leverage predefined templates and tools to efficiently create and adjust their organizational units according to business requirements, ensuring alignment with the overarching business structure. In addition to extending existing units, it also accommodates various configurations and settings that are central to maintaining a well-structured organizational framework in SAP.

While the other options involve aspects of organizational management, they focus more on specific tasks rather than the overarching process of managing and extending organizational structures within the SAP environment.