A third-party federated identity architecture is a system that allows users to access multiple services or applications across different domains or organizations using a single identity. The most significant benefit of implementing such an architecture is that it enables business objectives so departments can focus on their mission rather than the business of identity management. By delegating the authentication and authorization processes to a trusted third party, the departments can reduce the complexity, cost, and risk of managing their own identity systems, and improve the user experience and satisfaction. References: CISSP All-in-One Exam Guide, Eighth Edition, Chapter 5: Identity and Access Management, page 239; [Official (ISC)2 CISSP CBK Reference, Fifth Edition, Chapter 5: Identity and Access Management (IAM), page 397]