Which tool is used to validate the structure of a custom entity in Dynamics 365?

The Entity-Relationship Diagram (ERD) tool is used to validate the structure of a custom entity in Dynamics 365. This tool provides a visual representation of the data structure, showing how entities relate to each other. By utilizing ERD, developers can ensure that the relationships, attributes, and overall design of the custom entity align with best practices and fulfill the requirements of the application.

Using ERD, developers can effectively analyze the integrity of their data model, making sure that the relationships between entities are correctly defined and that any constraints or dependencies are accounted for. This helps in preventing issues that could arise from misconfigured entities, leading to better overall system performance and reliability.

Other tools listed may be useful in various scenarios within Dynamics 365. For instance, the Process Flow tool can visualize workflows and processes, while the Data Import Wizard facilitates data loading but does not focus on validating the entity structure. The Solution Checker helps in identifying issues in your solutions but is broader in scope, covering various aspects of a solution rather than focusing specifically on entity structure.