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An administrator has been tasked with expanding an existing VMware Cloud Foundation (VCF) workload domain by adding a new cluster. The VCF fleet has the following configuration:
* Three workload domains, including the management domain are configured.
* The management domain (WLD-01) and one of the workload domains (WLD-02) are running VCF 9.0.
* The other workload domain (WLD-03) is running VCF 5.2.1 and is an isolated workload domain.
When attempting to perform the required steps using the vSphere Client UI the cluster cannot be added to the WLD-02 workload domain. What step should the administrator perform to complete the workload domain expansion?
VMware Cloud Foundation 9.0 introduces a major architectural redesign that replaces the traditional SDDC Manager--centric domain management model with a unified Fleet Management architecture implemented through VCF Operations Fleet Manager. In this model, each Workload Domain operates with its own vCenter, but Enhanced Linked Mode (ELM) is removed to improve isolation, reduce blast radius, and support multi-site scalability. As a result, administrators logged into the vSphere Client of the Management Domain can no longer manage or expand clusters in other Workload Domains, which explains why the vSphere UI blocks the attempted expansion of WLD-02.
Fleet Manager becomes the new authoritative control plane for lifecycle, topology, host commissioning, and workload domain expansion. Only Fleet Manager maintains the full global view necessary to orchestrate cluster addition operations across distributed vCenters and domains. Because WLD-02 is running VCF 9.0 and is fully fleet-aware, its expansion must occur through VCF Operations Fleet Manager, not through the vSphere Client or legacy SDDC Manager workflows.
Options involving WLD-03 are invalid since that domain is running VCF 5.2.1, is isolated, and cannot participate in fleet-aware operations. SDDC Manager (A) is no longer the correct interface for VCF 9.0 domain expansion operations.
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