Copilot Studio rebuilt, Copilot at population scale, a model pulled
Build 2026 shipped the agent platform as infrastructure. The week after, it became product you actually build in. The new Copilot Studio went generally available worldwide, rebuilt around a modern orchestrator and a single workflow canvas. Dataverse exposed a real MCP tool surface, and Power Apps agents started learning from their own corrections. Then the scale arrived: NHS England, KPMG, and Atos moved Copilot and Agent 365 from pilot to hundreds of thousands of seats. And on Friday a frontier model your agents could call disappeared by government order.
This week's thread: from infrastructure to product, and from pilot to population
Edition 005 covered Build, where the parts an agent needs to run in production - identity, context, a meter, governance - shipped as product instead of slides. This week those parts started being used. The headline is the new Copilot Studio: a ground-up rebuild that collapses the maker experience from nine configuration tabs to four, swaps hand-wired topic branches for a modern orchestrator that picks its own tools and agents, and adds one workflow designer where structured steps and agent nodes live together with node-by-node testing and versioning. Underneath it, the grounding layer matured too. Dataverse documented a concrete MCP tool surface that admins can allowlist action by action, and Power Apps agents now persist user corrections as structured memory through closed-loop learning. Fabric and Power BI turned the same crank, with data answering reaching Copilot Cowork and Microsoft 365 Copilot Chat. Most of that product surface - the new Copilot Studio, the Dataverse MCP tools, the Power Platform update - sits in @Charles Lamanna's org, and it shipped in a single week. Then the demand side spoke louder than any keynote. NHS England put Microsoft 365 Copilot in front of 505,000 staff, KPMG rolled Copilot and Agent 365 to 276,000 professionals, and Atos took the new Microsoft 365 E7 licence to 56,000 people governing 19,000 agents. The week ended with a reminder that the model layer is not yours to control: the US government ordered Anthropic to suspend Claude Fable 5 three days after it launched in Foundry and GitHub Copilot. Read the week as one move - the platform became product, the field deployed it at population scale, and the supply chain underneath it showed its first real fracture.
Signal of the week
The new Copilot Studio is generally available, rebuilt for multi-step work
On June 9 Microsoft shipped a ground-up rebuild of Copilot Studio, now generally available worldwide. The maker experience drops from nine configuration tabs to four, putting the essential settings up front. The bigger change is orchestration: instead of hand-wiring topics and trigger branches, a modern orchestrator lets an agent pick the right mix of tools, knowledge, topics, and other agents for each task, and handle recursive, long-horizon work. A new visual workflow designer puts structured steps and AI steps on one canvas with node-by-node testing and robust versioning, and new agent nodes let a deterministic workflow hand a hard step off to an agent. The classic experience keeps running alongside the new one, so existing agents are not forced to migrate - makers opt in with Try now on the homepage.
Why it matters
This is the authoring surface for the multi-step agents Build promised, and it changes how you build. Less explicit topic plumbing, more autonomous tool selection, which is faster to build but demands new testing discipline to audit what the orchestrator actually chose. Pilot it on a non-critical agent first, and lean on node-by-node testing before you ship.
1Power Platform and extensibility
Dataverse gets a real MCP tool surface, and Power Apps agents learn from corrections
Two changes turned Dataverse into a first-class agent backend this week. First, the Dataverse MCP server now exposes a concrete, enumerable tool surface: named tools across querying (search_data, read_query), record operations (create, update, delete), schema management (table create, update, delete), metadata discovery (describe), file transfer, and skills. It works from Copilot Studio, GitHub Copilot in VS Code and the CLI, and Claude Desktop and Claude Code. Second, @Tiffany Treacy's June Power Platform update shipped closed-loop learning: corrections a user makes through the Power Apps agent feed now persist as structured memory and get applied automatically on future runs, with no retraining.
Why it matters
A named, enumerable tool list is what makes Dataverse access governable - admins can allowlist read tools and block delete_record in production, action by action. And closed-loop learning is the first time a Power Platform agent improves from use without a developer in the loop. Both are building blocks you can put under a client agent today.
- QuickAdvanced Connector Policies are generally available: action-level governance that can allowlist specific connector actions and block the MCP servers an agent is allowed to reach, replacing the blunt single-policy DLP model.
- QuickPower Platform Inventory now shows which connectors and connector operations each app, flow, and agent actually uses - the data you need for blast-radius analysis before you tighten a policy.
- QuickPower Automate desktop flows get side-by-side version comparison across subflows, actions, variables, and UI elements, plus a preview Run Power App action that opens a canvas app and passes data both ways.
2Microsoft 365 Copilot
Copilot Notebooks and Study Guide reach GA in Copilot Chat
Copilot Notebooks - project workspaces that pull chats, generated outputs, and reference files into one grounded context - began rolling out on June 11 to all Microsoft 365 Copilot Chat users, including Copilot Chat Basic. Notebook data lives in user-owned SharePoint Embedded containers, counts against SharePoint storage, and respects existing admin policies. Study Guide, the education-focused feature that turns uploaded material into structured Understand, Practice, and Test phases with flashcards, quizzes, and citations to the source, went generally available the same day. Both support 21 languages.
Why it matters
Notebooks landing in Copilot Chat Basic widens the reach well beyond paid Copilot seats - a persistent, shared project context users can adopt without a full licence. The catch for IT is storage: the SharePoint Embedded model means notebook content grows against tenant quota as adoption scales.
3Data and analytics
Power BI and Fabric go agentic, and Dataverse-to-Fabric sync goes low-latency
Microsoft Fabric and Power BI turned the agentic crank this week. Data answering - natural-language questions answered against governed semantic models - is now reachable from Fabric Skills, Copilot Cowork, and Microsoft 365 Copilot Chat for Frontier tenants, so a user can ask a report-grade question without opening Power BI. Report authoring itself became an agent skill: a preview powerbi-authoring plugin, installed through the GitHub Copilot CLI, lets an agent plan, write schema-correct report files, reload Power BI Desktop, screenshot the result, and iterate. A browser-based Copilot for web modeling, also in preview, renames tables, builds relationships, and writes DAX from prompts. Feeding all of it, low-latency sync for Dataverse to Fabric reached GA on June 9, pushing finance and operations data straight to Delta Parquet at over a million records per hour per table.
Why it matters
The agent-skill entry point matters most: Power BI report building is now a step you can orchestrate inside a larger agentic pipeline, through the same CLI your code agents already use. And low-latency sync means agents grounded in Dataverse can reason over near-real-time operational data, not yesterday's export.
4Governance and the control plane
The legacy Agent Registry Graph API retires today - move custom agents to Agent 365
Microsoft 365 message center notice MC1297981 set June 15 as the retirement date for the existing agent registry Graph API. Custom agents that were self-registered through that legacy API need to be re-registered through the new Agent 365-powered registration Graph API, available since May 1, or they stop working. Agents built in Copilot Studio, Foundry, or the Microsoft 365 agent builder are unaffected. The new API requires at least one Agent 365 licence, which folds custom code-first agents into the same control plane - Entra identity, Purview, Defender, Intune - as everything else.
Why it matters
If your team or an ISV you depend on shipped code-first agents against the Graph registry API, today is the cutover, so audit those registrations now. The licensing detail also matters: bringing custom agents under Agent 365 governance is no longer optional plumbing, it is a paid prerequisite to keep them discoverable and governed.
5The model supply chain
Claude Fable 5 shipped into Foundry and Copilot, then was suspended by US export control
On June 9 Anthropic launched Claude Fable 5, a Mythos-class model built for sustained, long-running agentic work, and it landed the same day in Microsoft Foundry and GitHub Copilot. Three days later it was gone. On June 12 Anthropic posted that it is suspending access to both Fable 5 and Mythos 5, citing a US government export control directive ordering the suspension, and said it is working to restore access. For anyone who had started routing agents to Fable 5 on Foundry or in Copilot, the model simply stopped being callable mid-week.
Why it matters
This is the model-supply-chain risk made concrete. A frontier model your agents depend on can disappear overnight by a decision neither you nor the vendor controls. The defensible design is model portability - an abstraction layer, fallbacks, and evals that let you swap the model behind an agent without rewriting it. Foundry's model-agnostic surface and a portable control spec exist for exactly this.
6Adoption at scale
NHS England, KPMG, and Atos move Copilot and agents from pilot to population
Three deployments this week showed the demand side catching up to the platform. NHS England announced on June 8 it is rolling Microsoft 365 Copilot out to 505,000 clinicians and support staff, the largest healthcare Copilot deployment to date, after a 30,000-user trial measured 43 minutes of admin time saved per person per day; the contract includes Copilot Studio and Agent 365. KPMG is deploying Copilot and Agent 365 to 276,000 professionals across 138 countries, with Agent 365 as the governance plane for the agents in its Foundry-built Workbench platform. And Atos is taking the new Microsoft 365 E7 licence - E5, Copilot, and Agent 365 in one SKU, powered by Work IQ - to all 56,000 employees, governing a population of 19,000 agents.
Why it matters
These are the reference numbers your next business case gets measured against. The 43-minutes-a-day figure from NHS is a concrete, public benchmark for regulated environments. And all three bought the agentic stack, not just chat - Agent 365 governance is the headline line item now, which is exactly the conversation to lead with when scoping enterprise work.
Voices to follow
- Microsoft EVP - Copilot, Agents & PlatformCharles Lamanna
Executive Vice President for Copilot, Agents, and Platform at Microsoft. He owns the strategy behind Copilot Studio, Agent 365, and the Power Platform, so when the agent stack's direction shifts, it usually shifts because of a decision his org made.
Microsoft EVP - Copilot, Agents & Platform - Microsoft Principal Group PM - DataverseJulie Koesmarno
Principal Group Product Manager at Microsoft, leading the Dataverse as Agent Data Platform team. Follow her to see where the governed data layer, MCP surface, and coding-agent plugins are heading before they ship.
Microsoft Principal Group PM - Dataverse as Agent Data Platform - Microsoft Principal Cloud Advocate - Power Platform + agentsDaniel Laskewitz
Principal Cloud Advocate at Microsoft, ex-Power Platform MVP and co-founder of Forward Forever. One of the clearest voices on multi-agent systems and Power Platform governance - the bridge between the maker community and the product teams.
Microsoft Principal Cloud Advocate - Power Platform governance + agents - Microsoft Principal PM - Copilot Studio (Power CAT)Henry Jammes
Principal Program Manager for Copilot Studio on the Power CAT team at Microsoft. Deep on agent-building mechanics, governance, and the release roadmap - a first-party source on what Copilot Studio can actually do.
Microsoft Principal PM - Copilot Studio (Power CAT) - Microsoft Partner Director - Foundry Agent ServiceJeff Hollan
Partner Director of Product at Microsoft, leading the Foundry agent platform: Agent Service, the Agent Framework, and the SDKs. The clearest source on how agents actually go from prototype to a hosted production runtime.
Microsoft Partner Director - Foundry Agent Service + Agent Framework - Microsoft Principal PM - Power Platform CATReza Dorrani
Principal Program Manager at Microsoft on the Power Platform CAT team. Where the maker community goes to see new Power Apps, Dataverse, and MCP capabilities demoed in practice rather than described in a blog.
Microsoft Principal PM - Power Platform CAT - ~56K followers - Copilot Studio MVPLisa Crosbie
6x Microsoft MVP, Practical AI for Business with Copilot and Agents at Barhead. Calm, hands-on voice on production-grade agent design - the one to follow when you want patterns you can ship, not just demo.
6x Microsoft MVP - YouTuber + International Speaker - ~21K followers - Microsoft Principal Cloud Advocate - Power Platform Advocacy LeadApril Dunnam
Principal Cloud Advocate and Team Lead for the Power Platform Advocacy team at Microsoft, and the face of Agent Academy. If a Copilot Studio feature or governance update ships, April has usually broken it down within 48 hours.
Microsoft Principal Cloud Advocate - Power Platform + AI Demystifier
Coming up
- June 16, 2026 · Work IQ APIs reach general availability. Consumption billing in Copilot Credits begins - enable consumptive billing and set spend limits before agents grounded in Work IQ start metering.
- End of June 2026 · Foundry Hosted Agents reach general availability. Sandboxed, per-agent-identity hosting for the Microsoft Agent Framework, LangGraph, and more; tracing and evaluation go GA alongside.
- July 2026 · Copilot Cowork reaches general availability.
- Mid-to-late July 2026 · Low-latency Dataverse-to-Fabric sync completes rollout. New Fabric links default to low-latency sync automatically once it reaches your region.
- June 2026 plenary · European Parliament votes on the Digital Omnibus on AI. The package postpones parts of the EU AI Act while keeping its risk-based core; a provisional agreement was reached on May 7.
This week's question
This week the platform you build on got rebuilt, the biggest enterprises moved from pilot to population, and a frontier model your agents could call vanished overnight by government order. Two questions for Monday: did your custom agents survive today's Agent Registry API cutover, and is Copilot Credit billing switched on before Work IQ starts metering on June 16? And the harder one: if a model your agents depend on disappeared tomorrow, the way Fable 5 just did, how fast could you swap it?
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