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Single Agent vs Multi-Agent Architectures: When Do You Need Each?
As artificial intelligence systems grow more sophisticated, the question of how to structure them becomes increasingly important. One of the most fundamental design decisions is whether to use a single-agent architecture or a multi-agent architecture. While both approaches can solve complex problems, they differ significantly in how they scale, adapt, and handle complexity. https://dellenny.com/single-agent-vs-multi-agent-architectures-when-do-you-need-each-with-microsoft-technologies-explained/Removal of Copilot Chat Availability in M365 Apps?!?
Received a post in Message Center today and would like clarification as to what capabilities Copilot Chat will retain as it is unclear from the message. This is a huge impact to users who have already adopted Copilot Chat in Word, Excel, PowerPoint and OneNote as well as training materials (both our own and those provided here by Microsoft). Will users be able to access Copilot Chat (basic) via pinned app in M365 apps? Will users only be able to access via web browser? The section below noted in red is very confusing (from the Microsoft message) -- who gets what features as both are mentioned in same paragraph? ---------------------------------- Microsoft 365 Copilot Chat – Updates to Copilot in Word, Excel, PowerPoint, and OneNote Starting April 15, 2026, Copilot will no longer be available in Word, Excel, PowerPoint, and OneNote for Copilot Chat users. To ensure a high-quality experience, we are reserving the full Copilot experience in these apps—with advanced reasoning and model choice—for users with a paid Microsoft 365 Copilot license. There are no other changes for users without a Microsoft 365 Copilot license. Copilot Chat still offers secure, AI web chat and the Word, Excel, and PowerPoint agents for chat-first content creation within the Microsoft 365 Copilot app. Additionally, users still get Copilot in Outlook with inbox and calendar grounding.
Cowork can't send emails?
Hi, all. I've been playing around with Copilot Cowork and really loving it, but with one problem. When it tries to send an email to anyone but myself, it can't. It tells me to approve, but I never get the approval prompt. I get errors like this: "Good question. The approval step typically appears as a confirmation dialog right here in our conversation before an email is sent. It worked fine for the test email to your own address, but when I tried sending to [otherperson], the system blocked it before the approval dialog could reach you" and "The platform is blocking the send to an external recipient and the approval dialog isn't surfacing properly." and "All three return the same error: the platform requires an approval step before executing any outbound send action, but that approval dialog isn't rendering in your session. The test email to yourself worked because self-sends appear to be auto-approved. This is a platform-level issue — not something I can fix from my side." Any thoughts? I'm not even sure where to start troubleshooting this.
Suggestion: Allow users to customize the UI name of MS Copilot (with “Powered by Microsoft 365”)
Background Microsoft Copilot is an extremely capable assistant, but its current visual identity is completely fixed (the name “Copilot” is always shown), even though users interact with it daily as a personal or team assistant. From a user experience perspective, this creates a small but important gap between using a tool and working with an assistant. Proposal Allow users to customize the visible name of their Copilot assistant, while maintaining a clear and consistent Microsoft branding indicator, for example: Holiday (name that the user creates for calling Microsoft Copilot 365 IA) Powered by Microsoft 365 Copilot (Text that Microsoft uses to reflect that it's already Microsoft Copilot). This proposal does not aim to change the underlying model, security, governance, or responsibility. It only affects the identity/presentation layer of the assistant. Why this matters (UX & adoption) Allowing users to name their assistant creates: Psychological ownership (“my assistant” instead of “the assistant”) Higher trust and willingness to delegate complex tasks Stronger long-term adoption and recurring usage In daily work, users naturally refer to assistants by name (“Ask Friday to review this document”), which helps integrate Copilot into real workflows instead of keeping it as an external tool. Enterprise perspective In organizational environments, a named assistant feels like part of the team rather than a generic external service. This improves internal communication, clarity, and acceptance of AI-assisted workflows. Importantly, the “Powered by Microsoft 365 Copilot” label keeps: brand visibility transparency technical and legal responsibility clearly with Microsoft This follows well-established patterns such as “Powered by Azure” or “Powered by Microsoft Security”. Strategic fit Microsoft already enables named and branded assistants through Copilot Studio. Extending this concept to the core Copilot experience feels like a natural next step with: Low technical risk (presentation-level feature) High UX impact No compromise on governance or brand integrity Closing Naming the assistant transforms the relationship from using AI to collaborating with AI. This small change could have a disproportionally positive effect on trust, adoption, and everyday productivity. Thanks for considering this feedback.
Can my agent use flows as tools when I'm a licensed M365 Copilot user?
I tried to create an agent in Copilot Studio which drafts responses to emails I receive in Outlook. There is no "draft a reply" tool, there is only "Send a reply" or "Draft a message". I don't want an AI agent to immediately send out email replies, I want to review them first, but I also would like to review them in the context of the original message (as opposed to having a bunch of messages in the drafts folder with no visible connection to the original email I received - like the "Draft a message" tool does). So I "added a tool" (which would be a "Flow") to the agent which just does 2 HTTP calls to the outlook graph api (one creates the reply, the second adds the generated content to the body). The flow checker tells me: More Copilot Credits are needed for this flow to run. Runs from agents by M365 Copilot users and testing don't consume credits. I am a "M365 Copilot user", so I'd expect this to work, and manually testing the flow works. However, when the agent tries to run the flow, it's being blocked with the error: The environment 'Default-<...>' does not have sufficient Copilot Credits to run workflows. So, can an agent by a M365 Copilot user run flows? Alternatively: is there a way to draft email responses which in Outlook end up visually connected to the original message?Copilot in Outlook Can Now Reschedule Conflicting Meetings Automatically | Microsoft 365 AI
📅 Microsoft Copilot just made Outlook meetings smarter. A new Copilot feature in Outlook can now automatically detect conflicting meetings and propose a reschedule — no more manual calendar juggling. Copilot analyzes: ✔ Your calendar ✔ Existing conflicts ✔ Availability of participants …and suggests the best new time, directly in Outlook. For busy professionals and teams, this is a big productivity win and another step toward truly AI‑assisted workdays. I’ve just published a short video showing how it works in practice 👇 https://youtu.be/xhTkvF8rCq8 Would you trust Copilot to manage your meetings? #MicrosoftCopilot #Outlook #Microsoft365 #AIProductivity #FutureOfWorkHow Copilot Automates Enterprise Workflows (Technical Breakdown)
In today’s enterprise landscape, automation is no longer just a competitive advantage it’s a necessity. However, traditional automation approaches like RPA (Robotic Process Automation) and custom scripting often require significant development effort, rigid rule definitions, and ongoing maintenance. Enter Microsoft Copilot a generative AI-powered assistant that transforms enterprise workflow automation by combining natural language processing, contextual understanding, and deep integration with business systems. This article goes beyond surface-level benefits and explores the technical architecture, real-world scenarios, and implementation strategies that make Copilot a powerful automation engine. https://dellenny.com/how-copilot-automates-enterprise-workflows-technical-breakdown/Cowork (Frontier) OneDrive/SharePoint document read errors
We've recently managed to start using the Cowork (Frontier) agent in M365 Copilot and some of the fantastic capabilities it provides. We're seeing an issue where right now the agent it failing to read data from withing documents such as Word documents in SharePoint and OneDrive. We see errors in the detail such as "ReadFileContent tool keeps failing with auth expired" and "Auth expired. Let me retry - the system should have refreshed the token.". Other agents appear to be able to access SharePoint/OneDrive content without error and people trying to access those documents definitely have full permissions (their own OneDrive as an example). Works when files are manually attached to the prompt. We've enabled model sub-processing which is the only dependency I can see for Cowork. Wondering if a widespread known issue or something specific to my environment?Running Copilot Retrieval Searches with the Microsoft Graph PowerShell SDK
The Copilot Retrieval API is a Microsoft Graph API that apps can use to search Microsoft 365 locations to find information to ground user prompts. Grounding means that the apps use the information found by Copilot to add context to the queries they submit to a generative AI engine for processing. Although I don’t have an immediate purpose for the API, it provides a nice insight into how grounding works. https://office365itpros.com/2026/04/14/copilot-retrieval-api/
AI-generated feedback summaries for managers - is this a thing yet?
Our managers are responsible for 10-15 direct reports each and the biggest complaint I keep hearing is that writing individual feedback for every person takes forever. Copilot can help draft emails and summarize meetings but I cant figure out how to get it to look at someone's goals progress, recent feedback, and 1:1 notes all together and suggest talking points or review comments. Is anyone using Copilot in any form to help managers write better, more data-backed feedback?
