Microsoft Foundry agents consume Azure resources, including AI model inference, token processing, and potentially additional services such as Code Interpreter, file search, and storage.

The Contoso case study specifies the following technical requirement:

" The total costs of Agent1 must be monitored and evaluated monthly. "

Option A is correct because Azure Cost Management + Billing provides comprehensive cost monitoring, analysis, and reporting for Azure resources, including resources consumed by Microsoft Foundry agents.

Administrators can navigate to Azure portal → Cost Management + Billing → Cost Management → Cost analysis.

Cost analysis supports monthly reporting, historical comparisons, cost breakdowns, filtering by resources or resource groups, and budget monitoring.

Option B is incorrect because billed messages in the Power Platform admin center relate to Power Platform and Copilot Studio consumption rather than comprehensive Microsoft Foundry agent costs.

Option C is incorrect because Microsoft 365 billing policies manage supported consumption-based Microsoft 365 Copilot services, not the complete Azure infrastructure costs associated with Foundry agents.

Option D is not the best answer because the Microsoft Foundry portal ' s Monitor experience provides valuable agent-level operational metrics and estimated token costs, but it does not necessarily capture every billable Azure resource used by an agent.

Microsoft explicitly recommends Azure Cost Management for comprehensive spending analysis and financial reconciliation.

Therefore, Cost Management + Billing in the Azure portal is the most appropriate solution for monitoring and evaluating Agent1 ' s total monthly costs.

Microsoft References:

Microsoft Learn — Plan and manage costs for Microsoft Foundry .

Microsoft Learn

Microsoft Learn — Monitor Microsoft Foundry costs using Azure Cost Management