Which document defines the scope of what is supported and not supported within the organization?

The correct document that defines the scope of what is supported and not supported within an organization is the Service Catalog. The Service Catalog provides a comprehensive listing of all IT services available to customers, including details about each service, such as eligibility, cost, and the processes involved in obtaining those services.

By clearly outlining what is included in the support services, the Service Catalog helps set expectations for both the IT service provider and the users or customers. It delineates what users can request and what the IT department is obligated to provide, thereby managing the relationship between service availability and user demands.

In contrast, other documentation like Service Level Agreements focuses more on the specific levels of service that will be delivered, while Service Asset and Configuration Management deals with tracking and managing assets and their configurations. Service Design relates to planning and creating new services rather than defining existing support scopes.