Review the update and plan any required actions before rollout.
Primary Audience
Why this score?
AT A GLANCE
END USERS
IT ADMINS
ROLLOUT TIMELINE
Aug–Dec 2026
📢 Official Microsoft Message Center Announcement
(Updated) Microsoft 365 Copilot: Use Microsoft Agent 365 agents as connected agents in declarative agents
Message ID: MC1478975 (Updated)
Updated November 9, 2026: We have updated the timeline. Thank you for your patience.
[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): Began in late August 2026 and is expected to complete by end of December 2026.
[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. |
Source: Microsoft Message Center • Analysed by MWPro
<<< [MC1478975] Archive
Tooltip: View earlier revisions of this post
