Explanation

Diagram Description automatically generated
1. AAD audit log -> Event Hub (other two choices, LAW, storage, but not available in this question)
https://docs.microsoft.com/en-us/azure/active-directory/reports-monitoring/tutorial-azure-monitor-stream-logs-to
2. Azure function has the Event hub trigger and Cosmos output binding
a. Event Hub trigger for function
https://docs.microsoft.com/en-us/azure/azure-functions/functions-bindings-event-hubs-trigger?tabs=csharp