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The Microsoft 365 Agents SDK allows you to build agents using code, in C#/.NET, JavaScript (Node.js), and Python.
You can connect an agent built with the Microsoft 365 SDK to your custom agent, allowing it to call this agent to respond to a user or a trigger.
Note
When you connect to agents outside of Copilot Studio, you're responsible for the use of such agents.
Go to the Agents page for your main agent and select Add an agent.
Under Connect to an external agent, select Microsoft 365 Agents SDK from the available agent types.
Enter the messaging endpoint URL for your SDK agent (by default, the endpoint ends with
/api/messages).Enter an appropriate Name and Description for your SDK agent. The description should describe the purpose of your SDK agent, allowing your main agent to understand when it should be used. For more information, see writing effective metadata.
Select the appropriate authentication method, depending on how your SDK agent is configured, from the Connection string dropdown. If you select an authentication type other than None, you must also complete the other authentication details.
Select Create.
Select the desired connection from the list of available connections or create a new connection between your A2A agent and your Copilot Studio agent.
Select Add and configure.