Sébastien Levert
@sebastienlevert.com
📤 697
📥 216
📝 253
Principal PM Manager at
#Microsoft
focusing on Microsoft 365 Copilot developer experiences.
📁 Point your agent at a SharePoint library. It searches, reads, and cites sources — with permissions enforced automatically.
themanifest.dev/blog/groundi...
#CopilotAgents
#SharePoint
2 days ago
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📦 Three .docx files + 10 lines of JSON = a grounded HR assistant. No SharePoint. No cloud storage. Knowledge ships with the agent.
themanifest.dev/blog/embedde...
#CopilotAgents
5 days ago
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Migrating EWS notifications to Microsoft Graph
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Migrating EWS notifications to Microsoft Graph - Microsoft 365 Developer Blog
Migrating from the Exchange Web Services (EWS) notification framework, which supports push, pull, and streaming notification types — to the Microsoft Graph subscription model represents a fundamental...
https://devblogs.microsoft.com/microsoft365dev/migrating-ews-notifications-to-microsoft-graph/
6 days ago
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Agents League Hackathon 2026 – Enterprise Agents
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Agents League Hackathon 2026 - Enterprise Agents - Microsoft 365 Developer Blog
From declarative agents for Microsoft 365 Copilot to fully autonomous multi-agent systems orchestrating complex workflows, developers now have the power
https://devblogs.microsoft.com/microsoft365dev/agents-league-hackathon-2026-enterprise-agents/
7 days ago
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🌍 14 languages. One amazing agent. Useless for Munich because it only speaks English. Here's how to fix that.
themanifest.dev/blog/localiz...
#CopilotAgents
#i18n
9 days ago
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🛠️ Manual agent releases are a governance bug. If instruction edits can change behavior, they belong in PRs, validation, and CI.
themanifest.dev/blog/cicd-pi...
#CopilotAgents
#DevOps
13 days ago
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🔄 Your agent's instructions are code. Every change alters behavior. CI/CD: source control → PR → pipeline → deploy.
themanifest.dev/blog/cicd-pi...
#CopilotAgents
#DevOps
14 days ago
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Build collaborative agents where work happens
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Build collaborative agents where work happens - Microsoft 365 Developer Blog
At Microsoft Build 2026, we're announcing new investments to help your agents become teammates in everyday work, from new interaction patterns to streamlined tooling.
https://devblogs.microsoft.com/microsoft365dev/build-collaborative-agents-where-work-happens/
14 days ago
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Work IQ: Production‑ready intelligence for every agent
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Work IQ: Production‑ready intelligence for every agent - Microsoft 365 Developer Blog
Work IQ provides a workplace intelligence layer that enables agents to access and reason over organizational data, context, and tools, continuously building a semantic understanding across Microsoft 365...
https://devblogs.microsoft.com/microsoft365dev/work-iq-production-ready-intelligence-for-every-agent/
15 days ago
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Frontier Tuning: Teaching AI to work the way you do
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Frontier Tuning: Teaching AI to work the way you do - Microsoft 365 Developer Blog
We're announcing the private preview of Frontier Tuning, a new approach to making AI work the way your business does by applying reinforcement learning inside your compliance boundary with your own data,...
https://devblogs.microsoft.com/microsoft365dev/frontier-tuning-teaching-ai-to-work-the-way-you-do/
15 days ago
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🚨 Instructions are a runtime contract, not a docs dump. Production agents need modular sections, explicit fallbacks, output contracts, and a focused testing loop.
themanifest.dev/blog/advance...
#CopilotAgents
16 days ago
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🚨 When your agent is TOO good, people forget it's AI. Disclaimers display before the first message. One JSON property.
themanifest.dev/blog/adding-...
#ResponsibleAI
17 days ago
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🔌 SharePoint for docs. Copilot Connectors for everything else — HRIS, wikis, CRMs. One connection ID in your manifest.
themanifest.dev/blog/groundi...
#CopilotAgents
20 days ago
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SharePoint Framework (SPFx) roadmap update – May 2026
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SharePoint Framework (SPFx) roadmap update – May 2026 - Microsoft 365 Developer Blog
SPFx is powering the future of Microsoft 365 with AI driven portals and deep integrations across SharePoint and Microsoft 365. The May 2026 update shares new features and the roadmap for the next evolution...
https://devblogs.microsoft.com/microsoft365dev/sharepoint-framework-spfx-roadmap-update-may-2026/
20 days ago
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⚡ Stop cloning manifests for every agent environment. Use Agents Toolkit env files for dev, prod, and v2 previews. Same repo, separate app IDs.
themanifest.dev/blog/multi-e...
#CopilotAgents
21 days ago
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🏗️ The gap between "works on my machine" and "available to every employee" kills more agents than bad code.
themanifest.dev/blog/publish...
#CopilotAgents
#DevOps
23 days ago
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🚨 You do not need a $30 Copilot license to start building declarative agents. Copilot Chat runs them for free. Pay when you need Graph grounding, not before.
themanifest.dev/blog/m365-de...
#CopilotAgents
#ProCode
24 days ago
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💡 Most enterprise questions are about people, not documents. The People capability gives agents org chart + expertise awareness.
themanifest.dev/blog/people-...
#CopilotAgents
27 days ago
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🚨 Enterprise hallucination = plausible-sounding nonsense. One setting fixes it: only answer from grounded sources.
themanifest.dev/blog/behavio...
#CopilotAgents
#AI
30 days ago
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⚡ LLMs are terrible at math. Code Interpreter = sandboxed Python runtime, one line of JSON. Precise answers instead of "approximately."
themanifest.dev/blog/code-in...
#CopilotAgents
about 1 month ago
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🏗️ One agent can't do everything. Connected Agents = microservices for AI. Specialists that delegate to each other seamlessly.
themanifest.dev/blog/connect...
#CopilotAgents
about 1 month ago
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General Availability of SharePoint Framework 1.23 – Advancing the modern developer experience
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General Availability of SharePoint Framework 1.23 - Advancing the modern developer experience - Microsoft 365 Developer Blog
We are excited to announce general availability for the SharePoint Framework 1.23. We are rolling out new features in extensions, preview of new CLI and addressing known npm audit issues.
https://devblogs.microsoft.com/microsoft365dev/general-availability-of-sharepoint-framework-1-23-advancing-the-modern-developer-experience/
about 1 month ago
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🚨 No eval report on your last agent commit? Every tweak is a trust exercise. The Agents Evaluations CLI scores responses with Azure AI metrics and gives you a JSON report ready for your PR.
themanifest.dev/blog/agents-...
#CopilotAgents
#ProCode
about 1 month ago
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Announcing the public preview of the Microsoft 365 Copilot Agent Evaluations tool
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Announcing the public preview of the Microsoft 365 Copilot Agent Evaluations tool - Microsoft 365 Developer Blog
The Microsoft 365 Copilot Agent Evaluations tool helps developers measure and improve the quality of agents they build for Microsoft 365 Copilot.
https://devblogs.microsoft.com/microsoft365dev/announcing-the-public-preview-of-the-microsoft-365-copilot-agent-evaluations-tool/
about 1 month ago
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🔍 Agent worked yesterday, hallucinating today. 80% of the time? It's the instructions. Here's how to trace it.
themanifest.dev/blog/debuggi...
#CopilotAgents
#Debugging
about 1 month ago
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🚀 API Plugins turn declarative agents from knowledge bases into action engines. Describe your REST API, the model decides when to call it.
themanifest.dev/blog/api-plu...
#CopilotAgents
#API
about 1 month ago
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🔐 MCP plugin auth shares a foundation with API plugins, but the gaps trip you up. API keys? Not supported. Auth in the wrong place? Silent failure.
themanifest.dev/blog/authent...
#CopilotAgents
#MCP
about 1 month ago
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Announcing general availability of the mailbox import and export Microsoft Graph APIs
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Announcing general availability of the mailbox import and export Microsoft Graph APIs - Microsoft 365 Developer Blog
The mailbox import and export APIs on Microsoft Graph are now generally available.
https://devblogs.microsoft.com/microsoft365dev/announcing-general-availability-of-the-mailbox-import-and-export-microsoft-graph-apis/
about 1 month ago
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Python support for the Microsoft Teams SDK is now generally available
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Python support for the Microsoft Teams SDK is now generally available - Microsoft 365 Developer Blog
Python developers can now build Teams-native apps and agents using the same SDK surface that powers modern Teams experiences across our TypeScript and .NET stacks
https://devblogs.microsoft.com/microsoft365dev/python-support-for-the-microsoft-teams-sdk-is-now-generally-available/
about 1 month ago
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Sponsor group type requirements for agent identities
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Sponsor group type requirements for agent identities - Microsoft 365 Developer Blog
As part of moving to general availability (GA) for Entra Agent ID, agent identity objects will only accept dynamic membership groups and unified (Microsoft 365) groups as group-type sponsors.
https://devblogs.microsoft.com/microsoft365dev/sponsor-group-type-requirements-for-agent-identities/
about 1 month ago
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🔌 Build your tool integration once as an MCP server. Plug it into Copilot, Claude, ChatGPT — no rewrites. One manifest entry, OAuth handled by the toolkit, zero middleware.
themanifest.dev/blog/mcp-ser...
#CopilotAgents
#MCP
about 1 month ago
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🎯 Your agent IS your instructions. A 5-part framework that turns vague chatbots into production-grade agents.
themanifest.dev/blog/craftin...
#CopilotAgents
#AI
about 2 months ago
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🔐 Most declarative agent API plugin auth failures? A redirect URI typo. Three auth types — OAuth, API key, None. Three gotchas that silently kill the flow. Full breakdown:
themanifest.dev/blog/authent...
#CopilotAgents
about 2 months ago
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From prompt to production: Teams agent setup, simplified
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From prompt to production: Teams agent setup, simplified - Microsoft 365 Developer Blog
Learn how to use a coding agent to register and agent with Teams.
https://devblogs.microsoft.com/microsoft365dev/from-prompt-to-production-teams-agent-setup-simplified/
about 2 months ago
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SharePoint Framework (SPFx) roadmap update – April 2026
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SharePoint Framework (SPFx) roadmap update – April 2026 - Microsoft 365 Developer Blog
SPFx is powering the future of Microsoft 365 with AI driven portals and deep integrations across SharePoint and Microsoft 365. The April 2026 update shares new features and the roadmap for the next evolution...
https://devblogs.microsoft.com/microsoft365dev/sharepoint-framework-spfx-roadmap-update-april-2026/
about 2 months ago
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🔥 Asked Copilot what my team discussed last week, typed "implement that," and got a working declarative agent scaffolded from our actual Teams conversations.
themanifest.dev/blog/work-co...
#CopilotAgents
about 2 months ago
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🔥 I used a coding agent to build a Copilot agent — empty folder to deployed in 20 minutes. Three prompts, zero hand-authored files. Agents Toolkit Skills are the secret ingredient.
themanifest.dev/blog/buildin...
#CopilotAgents
#ProCode
about 2 months ago
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🔥 Your agent's instructions file is a behavioral contract — not a config toggle. One bad edit can break compliance. Pro-code gives you PRs, CI/CD, and real review trails.
themanifest.dev/blog/why-pro...
#CopilotAgents
#ProCode
about 2 months ago
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🔌 Built an MCP server for Claude or VS Code? It already works with Microsoft 365 Copilot agents — one manifest, OAuth handled, no rewrites. Here's how:
themanifest.dev/blog/mcp-ser...
#CopilotAgents
#MCP
about 2 months ago
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MCP Apps now available in Copilot chat
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MCP Apps now available in Copilot chat - Microsoft 365 Developer Blog
Agents bring rich, app powered UI experiences directly into Microsoft 365 Copilot chat, via MCP Apps or the OpenAI Apps SDK. Read about what customers and partners are building.
https://devblogs.microsoft.com/microsoft365dev/mcp-apps-now-available-in-copilot-chat/
2 months ago
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Breaking Change Ahead: Graph API Updates to Sensitive Email Properties
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Breaking Change Ahead: Graph API Updates to Sensitive Email Properties - Microsoft 365 Developer Blog
Starting 12/31/2026, we'll restrict sensitive email properties updates on non-draft messages. Add Mail-Advanced.ReadWrite to avoid failures.
https://devblogs.microsoft.com/microsoft365dev/graph-api-updates-to-sensitive-email-properties/
3 months ago
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SharePoint Framework (SPFx) roadmap update – March 2026
devblogs.microsoft.com/microsoft365...
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SharePoint Framework (SPFx) roadmap update – March 2026 - Microsoft 365 Developer Blog
SPFx is powering the future of Microsoft 365 with AI driven portals and deep integrations across SharePoint Teams and Viva. The March 2026 update shares new features and the roadmap for the next evolution...
https://devblogs.microsoft.com/microsoft365dev/sharepoint-framework-spfx-roadmap-update-march-2026/
3 months ago
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Changes to attachment IDs for inline images in Outlook add-ins
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Changes to attachment IDs for inline images in Outlook add-ins - Microsoft 365 Developer Blog
Read how inline image attachments are handled when they’re programmatically added to a mail item's signature or body in Outlook on the web and the new Outlook for Windows
https://devblogs.microsoft.com/microsoft365dev/changes-to-attachment-ids-for-inline-images-in-outlook-add-ins/
3 months ago
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Build business understanding with Dataverse in Microsoft 365 Copilot
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Build business understanding with Dataverse in Microsoft 365 Copilot - Microsoft 365 Developer Blog
Microsoft 365 Copilot is now embedded as an in-app sidecar within Power Apps, Dynamics 365 Sales, and Dynamics 365 Customer Service—removing the need to switch between apps to find context or complete...
https://devblogs.microsoft.com/microsoft365dev/build-business-understanding-with-dataverse-in-microsoft-365-copilot/
3 months ago
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Prepare your add-in for Outlook ribbon improvements
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Prepare your add-in for Outlook ribbon improvements - Microsoft 365 Developer Blog
Explore the latest Outlook ribbon update to enhance how add-ins appear in Outlook and streamline your workflow.
https://devblogs.microsoft.com/microsoft365dev/prepare-your-addin-for-outlook-ribbon-improvements/
3 months ago
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SharePoint Framework (SPFx) roadmap update – February 2026
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SharePoint Framework (SPFx) roadmap update – February 2026 - Microsoft 365 Developer Blog
We move towards spring 2026 with strong momentum across the SharePoint Framework and an increasing sense of excitement across the ecosystem. SPFx continues to be a foundational platform for building intelligent,...
https://devblogs.microsoft.com/microsoft365dev/sharepoint-framework-spfx-roadmap-update-february-2026/
4 months ago
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Increased control over Office Add-in user experiences
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Increased control over Office Add-in user experiences - Microsoft 365 Developer Blog
Explore how enhanced user control improves the Office Add-in experience and addresses customer feedback on launch behavior.
https://devblogs.microsoft.com/microsoft365dev/increased-control-over-office-add-in-user-experiences/
4 months ago
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Handling Legacy User Settings in SharePoint Framework
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Handling Legacy User Settings in SharePoint Framework - Microsoft 365 Developer Blog
Introduction The SharePoint Framework (SPFx) has undergone some important changes in how it handles Entra ID app registration and security models. Here you can find additional details about what was updated...
https://devblogs.microsoft.com/microsoft365dev/handling-legacy-user-settings-in-sharepoint-framework/
4 months ago
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Mastering User Settings in SharePoint Framework
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Mastering User Settings in SharePoint Framework - Microsoft 365 Developer Blog
User preferences and settings are fundamental components of modern web applications. When developing SharePoint Framework (SPFx) solutions, the ability to store and manage user-specific configurations...
https://devblogs.microsoft.com/microsoft365dev/mastering-user-settings-in-sharepoint-framework/
4 months ago
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Deprecation notice: Teams Live Events meeting creation via Microsoft Graph
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Deprecation notice: Teams Live Events meeting creation via Microsoft Graph - Microsoft 365 Developer Blog
Creating Teams Live Events via the Microsoft Graph isBroadcast API is deprecated. We encourage developers to use Virtual Event APIs instead.
https://devblogs.microsoft.com/microsoft365dev/deprecation-notice-teams-live-events-meeting-creation-via-microsoft-graph/
4 months ago
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