<![CDATA[Enterprise portals have traditionally served as navigational interfaces for service discovery, deterministic actions, and permission-scoped access. The emergence of agentic artificial intelligence introduces a different interaction model in which user intent can be interpreted, decomposed, and executed through multi-step actions across heterogeneous enterprise workflows and operational environments at scale. This study examines the architectural changes required when enterprise portals evolve from navigation-oriented interfaces into environments capable of hosting and governing agentic interactions. The study introduces the Capability-Exposure Framework (CEF), a four-dimensional architectural model comprising intent-oriented discovery, shared context management, capability-service exposure, and governed autonomy. The framework is examined through a qualitative case analysis of the Microsoft Azure Portal and its documented integration of agentic capabilities, followed by a structural comparison with agentic capabilities documented for the AWS Management Console and Google Cloud console. The analysis shows that agentic portal integration requires more explicit permission scoping, tenancy isolation, contextual controls, and auditability than conventional portal operation. It also identifies cross-platform convergence toward explicit confirmation mechanisms for agent-initiated state changes and toward service interfaces that expose machine-interpretable capabilities rather than data-oriented operations alone. The results indicate that effective agentic integration depends on coordinated changes across the portal, service, identity, context, and governance layers. The study does not evaluate quantitative performance metrics; instead, it contributes a structural vocabulary for analyzing portal modernization and a migration perspective for enterprise architects and platform teams. The findings establish agent integration as an architectural transformation involving service capabilities and governance mechanisms, rather than merely an additional user interface feature]]>
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