In which scenario is the Oracle Integration (OIC) connectivity agent NOT required?

The Oracle Integration (OIC) connectivity agent is primarily used to establish a secure connection between OIC in the public cloud and resources located in a private network, such as on-premises applications or databases behind a firewall. While an Oracle Autonomous Data Warehouse (ADW) can be deployed with a private endpoint, the connectivity agent is not the only method for OIC to connect to it. As both OIC and ADW are native Oracle Cloud Infrastructure (OCI) services, OIC can be configured to use OCI networking features (like a service gateway or by assigning the OIC instance access to a Virtual Cloud Network) to communicate with a private ADW directly. Because a viable alternative to the agent exists, it is not strictly required.

B. Transferring files to an FTP server installed on-premises or behind a firewall: An on-premises FTP server is in a private network. The connectivity agent is the standard and required mechanism for OIC to bridge the public cloud and this private resource.
C. Creating orders in Oracle E-Business Suite: Oracle E-Business Suite is typically hosted on-premises or in a private network. The connectivity agent is required for the OIC adapter to communicate with it.
D. Publishing messages to Azure Service Bus: While a public Azure Service Bus does not require an agent, if it were configured with a private endpoint, the connectivity agent would be the required method for OIC to establish a connection.

1. Oracle Cloud Infrastructure Documentation, "Connect to Private Resources in a VCN": This document explains how an Oracle Integration instance can be configured to access private resources within an OCI VCN. It states, "You can create an Oracle Integration instance with a network endpoint in a specific VCN and subnet of your choice. This enables the instance to connect to any private resource that is reachable from that subnet." This confirms an alternative to the connectivity agent for private OCI resources like ADW.

2. Oracle Cloud Infrastructure Documentation, "About the Connectivity Agent": This official guide describes the agent's purpose: "The connectivity agent enables you to create integrations that connect to your on-premises applications... The connectivity agent removes the complexity of having to poke a hole in the firewall to allow inbound traffic." This highlights its primary use for on-premises scenarios (like options B and C).

3. Oracle Help Center, "Prerequisites for Creating a Connection" (for Oracle ATP/ADW Adapter): The documentation for the Oracle Autonomous Database Adapter notes, "For an Oracle ATP/ADW database on a private endpoint, you must... associate the connection with a connectivity agent." While this shows the agent is a valid option, the existence of the native VCN connectivity method (Reference 1) means the agent is not the only option, and therefore not strictly required.