Question:
You need to enable a third-party SaaS application to send events directly to your Azure subscription for processing by your custom applications. What type of Event Grid topic should you configure to achieve this?
Answer:
Partner Topics are designed specifically for enabling third-party services or SaaS applications to push events into your Azure subscription. These events can then be processed by Azure Functions, Logic Apps, or other subscribers to the topic.
System Topic: This is for Azure services that natively emit events, like Blob Storage or Event Hubs. You use system topics when you’re dealing with Azure-native resources.
Custom topics are for your own applications to send events into Event Grid—not for third-party SaaS. If the source isn’t a partner but something you built, this would be the choice.
Event Hub Topic: Event Hub isn’t even part of Event Grid’s topic system. It’s used for high-throughput streaming of telemetry or event data, not the discrete events Event Grid handles.