What is necessary for a System Administrator to do when creating a Custom Report Type?

When creating a Custom Report Type, it is essential for the System Administrator to define the fields to include. This step is fundamental as it directly impacts the data that will be displayed in the reports generated from that report type. The selection of fields allows the administrator to tailor the report to meet specific organizational needs, ensuring that relevant information is captured and represented correctly.

Having a well-defined set of fields not only helps in generating meaningful insights but also aids users in understanding the context of the data they are working with. This capability to customize the report fields enables users to focus on the most pertinent data for their analyses and reporting needs.

While other options may involve considerations that impact the functionality and accessibility of the report type, defining fields is the foundational step in the creation of a Custom Report Type. It sets the groundwork for how data will be compiled and viewed in reports.