Is it advisable to recreate Account and Contact system entities across multiple custom entities?

The advice against recreating Account and Contact system entities across multiple custom entities is grounded in the fundamental design and structure of the Microsoft Dataverse. Accounts and Contacts are core entities in the platform, each holding specific attributes and relationships that are universally recognized and utilized across various applications and processes.

Recreating these entities could lead to several complications. For starters, it would create redundancy and confusion within your data model. By having multiple versions of essential entities, you could face challenges in maintaining data integrity, consistency, and synchronization across the organization. Additionally, leveraging the default Account and Contact entities allows you to take advantage of built-in features such as out-of-the-box relationships, workflows, and integrations that enhance functionality and reduce development time.

Furthermore, using the standard entities establishes a clearer architecture, making it easier to manage and extend functionalities without unnecessary duplication of effort. The existing features are designed to cater to a wide range of business scenarios, which would be difficult to replicate through custom entities. Therefore, utilizing the default Accounts and Contacts whenever possible promotes best practices in data management and aligns with the overall approach to system design in the Power Platform ecosystem.