Microsoft's Oracle Exadata Database on Dedicated Infrastructure observability guidance explicitly defines a no-duplicate-destination rule for these resources: two diagnostic settings cannot send the same log categories to the same destination. Each diagnostic-setting configuration must therefore remain unique.

An Exadata resource can have multiple diagnostic settings—Microsoft documents a maximum of five per resource—but those settings are intended to provide different category/destination combinations. If an administrator attempts to create another setting with the same log categories targeting the same Log Analytics workspace, the duplicate configuration is rejected rather than automatically consolidated.

Microsoft Sentinel does not serve as a conflict-management mechanism for the diagnostic-settings configuration, and the platform does not resolve the collision by modifying Log Analytics retention. Retention is a separate workspace/data-management concern.

This rule prevents unintended duplicate ingestion and avoids unnecessary telemetry duplication and associated ingestion cost.

Therefore, A accurately describes the outcome.

Study Guide reference: Provision and operate Oracle AI Database@Azure Resources — Exadata logging, Azure Monitor diagnostic settings, Log Analytics and observability constraints.

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