A service account access key and intercluster LIFs are required for an ONTAP FabricPool connection to Google Cloud Storage. ONTAP must authenticate to the object store, which requires cloud access credentials associated with an account that has access to the bucket. ONTAP also needs intercluster LIFs because FabricPool cloud-tier traffic uses intercluster networking to reach remote object storage from the nodes hosting tiered data. A Certificate Authority certificate may be relevant in some object-store SSL validation scenarios, but the core required components in this question are credentials and ONTAP network reachability. ExpressRoute is an Azure private connectivity service and is not a Google Cloud Storage requirement. The support engineer should separate cloud-provider authentication from ONTAP pathing: both must be present for FabricPool to attach and communicate with the cloud tier. References/topics: FabricPool with Google Cloud Storage, service account access keys, intercluster LIFs, object-store authentication, and cloud-tier networking.
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