MC1478975 - Microsoft 365 Copilot: Use Microsoft Agent 365 agents as connected agents in declarative agents
Microsoft 365 Message Center announcement MC1478975.
MS Message Center's Summary
Microsoft is introducing support for Agent2Agent protocol enabled agents to function as connected services within declarative agents for Microsoft 365 Copilot. Rollout begins in late August 2026 and concludes by late September 2026. Administrators must manage and approve these agents through the Microsoft 365 admin center before users can access them in workflows.
- Administrator impact
- Administrators must review and approve connected agents via the Microsoft 365 admin center.
- End user impact
- Users gain access to enhanced conversational workflows through approved declarative agents.
- Importance
- 5/10: This feature introduces new administrative governance controls and AI agent capabilities that require review before user deployment.
Microsoft Summary
Microsoft 365 now supports Microsoft Agent 365 agents using the Agent2Agent protocol as connected agents in declarative agents, enhancing AI interactions and workflows. Administrators manage and approve these agents via the Microsoft 365 admin center. Rollout begins late August 2026, expanding flexibility and governance for developers and users.
- Message Center ID
- MC1478975
- Category
- stay Informed
- Severity
- normal
- Services
- Microsoft Copilot (Microsoft 365), Microsoft 365 Copilot Chat
- Tags
- New feature, User impact, Admin impact
- Roadmap ID
- 567670
- Platforms
- Android, Desktop, iOS, Web
- Published
- 2026-09-25
- Last updated
- 2026-09-25
- Expires
- 2026-10-30
[What and why] Microsoft is introducing support for Microsoft Agent 365 agents that implement the Agent2Agent (A2A) protocol, allowing them to be used as connected agents in declarative agents built with Microsoft 365 Agents Toolkit. This enhancement expands the types of external agent services that declarative agents can connect to. In addition to existing support for OpenAPI and Model Context Protocol (MCP) servers, declarative agents can now connect to Agent2Agent-enabled agents, enabling natural language interactions and support for more complex workflows. This feature gives developers greater flexibility when building declarative agents while providing administrators centralized management and governance through the Microsoft 365 admin center. [Rollout schedule] General Availability (Worldwide): Beginning in late August 2026 and expected to complete by late September 2026 Microsoft internal deployment (MSIT): Available now [Impact on your organization] Who is affected Microsoft 365 administrators who manage agents in the Microsoft 365 admin center Developers building declarative agents with Microsoft 365 Agents Toolkit Users who are assigned access to approved Microsoft Agent 365 agents Platforms and services Microsoft 365 Copilot Microsoft 365 admin center Microsoft 365 Agents Toolkit Declarative agents What will happen Administrators can install Microsoft Agent 365 agents that support the Agent2Agent protocol from the All agents page in the Microsoft 365 admin center. Declarative agents can use approved Agent2Agent-enabled agents as connected agents. Agent2Agent support is added alongside existing support for OpenAPI and MCP server connections. Users cannot install Agent2Agent-enabled Microsoft Agent 365 agents themselves. Administrators can review Agent2Agent-connected agents from the Connected agents tab in the declarative agent details page before approving their use. [Action required and recommendations] Action may be required. Before rollout: Review Microsoft Agent 365 agents available in the All agents page of the Microsoft 365 admin center. Determine which Agent2Agent-enabled agents should be made available to users in your organization. Review connected agents associated with declarative agents from the Connected agents tab before approving their use. Update any internal governance, agent approval, or deployment processes as appropriate. Consider notifying administrators and developers in your organization about the availability of Agent2Agent-connected agents and the associated review and approval process. [Compliance considerations] Compliance consideration Answer Does this change introduce or significantly modify AI, machine learning, or agent capabilities that interact with or provide access to customer data? Yes. This update introduces support for Agent2Agent-enabled Microsoft Agent 365 agents as connected agents within declarative agents. Organizations should review how these connected agents interact with customer data before approving them for use. Does this change provide end users with a new way to interact with generative AI? Yes. Users can interact with declarative agents that are connected to Agent2Agent-enabled agents, enabling new AI-powered experiences and workflows. Does this change include an admin control? Yes. Administrators can install, review, and approve Agent2Agent-enabled Microsoft Agent 365 agents through the Microsoft 365 admin center before they are available for use.