ChangeIntelIT change radar
Public mode

No access to your tenant or devices. Every item links to its source. What this means

Some sources, documents or advisories need attention: 271/272 feeds/APIs · 469/469 docs · 8/9 advisories · checked 16:49 UTC Customize Public modeDiscuss ChangeIntel on Discord
MC1162288 Stay informedUpdated messageNew featureUser impactAdmin impact

Microsoft Outlook: Declarative Agents in Copilot Chat coming to classic Outlook for Windows

From Microsoft 365 Message Center Archive by Merill Fernando · Microsoft may not have sent this notice to your tenant.
Exchange Online
Microsoft 365 admin center

Rollout

Roadmap
481559

Rollout dates are often only in the text. When Microsoft moves them, the change shows under "What changed".

Schedule dates changed in the text

Date phrases in schedule sentences differ between the versions this installation saw
  • Seen 3 Nov 2025 late October 2025, mid-December 2025 → early January 2026, end of January 2026

Read from date phrases in Microsoft's text, not from notice metadata. A changed phrase can be a moved rollout, a new milestone or just rewording; "What changed" below shows which.

What the notice says

Microsoft’s text, safely structured

Updated November 3, 2025: We are making additional fixes which will delay this release. Our updated plan is to make this feature available by end January, 2026. Thank you for your patience.

Introduction

To enhance the extensibility of Microsoft 365 Copilot, we’re introducing support for Declarative Agents in Copilot Chat within classic Outlook for Windows. Declarative Agents will be available for Copilot Chat users (without a Microsoft 365 Copilot license) and Microsoft 365 Copilot users (with a Microsoft 365 Copilot license). Declarative Agents allow users to customize their Copilot experience by integrating plugins, enterprise connectors, and orchestration logic. This update aligns classic Outlook with other Copilot Chat experiences, delivering consistent agent capabilities across platforms.

This update is tracked under Microsoft 365 Roadmap ID 481559.

When this will happen

General Availability (Worldwide): We will begin rolling out early January 2026 (previously late October 2025) and expect to complete by end of January 2026 (previously mid-December 2025).

How this will affect your organization

Who is affected:

  • Organizations using classic Outlook for Windows with Microsoft 365 Copilot Chat
  • Admins managing Copilot extensibility and agent deployment

What will happen:

  • Declarative Agents will be available in Copilot Chat within classic Outlook for Windows
  • Users will see a right-side panel in Outlook showing:
    • Agents previously installed by the user
    • Agents deployed by the admin
    • Entry points to browse agents in the app store
    • Option to create a new agent
  • Declarative Agents in Copilot Chat are enabled by default for Microsoft 365 tenants with Copilot licenses
  • No admin opt-in is required to use agents in Copilot Chat
  • Advanced agent capabilities (access to SharePoint or Graph connectors) require explicit admin opt-in and billing setup
  • Admins can manage agents through the Integrated apps section of the Microsoft 365 admin center, including:
    • Enabling or disabling Declarative Agents for the organization
    • Assigning access to specific users or groups
    • Blocking or removing agents from the organizational catalog
    • Managing agent visibility and availability

Licensing tiers

  • Microsoft 365 Copilot: Requires a Microsoft 365 Copilot license. Users get full access to Declarative Agents, including those integrated with plugins, enterprise connectors, and advanced orchestration features
  • Copilot Chat: Designed for users without the Copilot license. These users can still access Copilot Chat and build knowledge-only Declarative Agents, but with limited capabilities

What you can do to prepare

  • Review agent management settings in the Integrated apps section of the Microsoft 365 admin center
  • Ensure Copilot extensibility is enabled for your organization if you plan to use agents.
  • If you plan to use advanced agent capabilities (such as Graph or SharePoint connectors), configure billing and opt-in via the Microsoft 365 admin center or Power Platform admin center.
  • Communicate this update to helpdesk and support teams.

Learn more:

What changed

Between archive captures, newest first

  1. Updated OctoberNovember 3, 2025: We haveare making additional fixes which will delay this release. Our updated the timeline.plan is to make this feature available by end January, 2026. Thank you for your patience. Introduction: To enhance the extensibility of Microsoft … When this will happen: General Availability (Worldwide): We will begin rolling out early January 2026 (previously late October 20252025) and expect to complete by end of January 2026 (previously mid-December 2025.2025). How this will affect your organization: Who is affected: Organizations using classic …

    • Tags New feature, User impact, Admin impact → Updated message, New feature, User impact, Admin impact

    Updated October 3, 2025: We have updated the timeline. Thank you for your patience. Introduction: To enhance the extensibility of Microsoft 365 Copilot, we’re introducing support for Declarative Agents in BizCopilot Chat within classic Outlook for Windows. Declarative Agents will be available for Copilot Chat users (without a Microsoft 365 Copilot license) and Biz Chat Starter within classic Outlook for Windows.Microsoft 365 Copilot users (with a Microsoft 365 Copilot license). Declarative Agents allow users to customize their Copilot experience by integrating plugins, … agents from the organizational catalog Managing agent visibility and availability Licensing tiers: Copilot Chat (Mainline):Microsoft 365 Copilot: Requires a Microsoft 365 Copilot license. Users get full access to Declarative … including those integrated with plugins, enterprise connectors, and advanced orchestration features Copilot Chat Starter: Chat: Designed for non-AI SKU users (users without the Copilot license).license. These users can still access Copilot Chat and build knowledge-only Declarative Agents, …

  3. · first version seen

Learn more

Links from the notice and their documentation checks

No related evidence found in this installation's recent collection. This does not establish that no announcement exists.

Not confirmed here

What this page cannot tell you
  • Whether your tenant is affected: this is Microsoft's notice, not a check of your settings.
  • 2 linked pages have not been read yet.
ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 27 Oct 16:49 UTC · 271 of 272 readable · 269 fully read · documentation 469/469 current

No accounts or analytics; your preferences stay in your browser. Information, not advice. ChangeIntel is an independent tool and is not affiliated with or endorsed by Microsoft, Apple, Google, Broadcom (VMware), Jamf, Oracle, Mozilla, or any other vendor it covers. Product names are trademarks of their owners. Built by Evotec.