Copilot in Word can't read chat attachments; Word for web file picker shows “no token obtained”
Summary of the issue I am seeing a persistent failure with Copilot attachments specifically inside Microsoft Word. Copilot in Word desktop and Word for the web can recognize an uploaded chat attachment by filename or OneDrive URL, but it cannot read the file contents. It reports the uploaded file as empty, corrupted, or in a format it cannot process. The same files are successfully read by standalone Microsoft 365 Copilot Chat using the same Microsoft account, and file uploads also work in Excel Copilot and PowerPoint Copilot. Failure started 10 days ago, with no obvious changes in settings on my end. The most useful diagnostic clue so far is that Word for the web’s Copilot attachment/file-picker path has also failed before any file was selected, showing “Something went wrong, please try again or refresh the page, no token obtained.” In Chrome, Word for the web produced a SharePoint-style error page with a correlation ID. This makes the issue look less like a bad file or local Word installation problem and more like a Word Copilot attachment-picker, OneDrive/SharePoint authorization-token, or file-handoff problem. Environment and scope Windows 11, Pro. Microsoft Word desktop: issue reproduced after updating Office and Windows. Word for the web: issue reproduced in Edge, Edge InPrivate, and Chrome. Standalone Microsoft 365 Copilot Chat / copilot.microsoft.com / m365.cloud.microsoft/chat: uploaded files can be read successfully with the same Microsoft account. Excel Copilot and PowerPoint Copilot: uploaded files work. OneDrive in Chrome: upload/download and file access work normally with the same account. Same Microsoft account used throughout. File types tested include tiny TXT files, PDFs, and DOCX files, including a complex DOCX. Copilot in Word can read the active Word document normally; the failure is limited to files uploaded as Copilot chat attachments inside Word. Observed behavior In Word desktop, Copilot chat accepts or recognizes the attachment metadata, including filename and sometimes a OneDrive URL, but when asked to read or summarize the file it says the file appears to be empty, corrupted, or in a format it cannot process. This happens even with a very small TXT test file. In Word for the web, the same general failure occurs. In one clean test, I created a brand-new blank Word document in Word for the web, opened Copilot, attached a tiny TXT file, and asked what the uploaded TXT file said. Copilot responded: “The uploaded file ingestion_test_731_1915.txt appears to be empty, corrupted, or in a format I can’t process, so I can’t read any text from it.” In another Word for the web test, clicking Copilot’s “+” attachment button and choosing either “My Files” or “Recent” opened a mostly blank window saying: “Something went wrong, please try again or refresh the page, no token obtained.” This occurred before any file was selected. In Chrome, Word for the web produced this error when trying to use the Copilot attachment flow: “Sorry, something went wrong. An unexpected error has occurred. Technical Details: Troubleshoot issues with Microsoft SharePoint Foundation.” The error included Correlation ID 64062ea2-3083-8000-a0f7-fbf4f6bb617d and Date/Time 8/4/2026 12:21:38 PM. Evidence matrix Test Result Standalone Microsoft 365 Copilot Chat / copilot.microsoft.com DOCX, PDF, and TXT uploads can be read successfully with the same account. OneDrive in Chrome Upload, download, and file access work normally. Excel Copilot Uploaded files work. PowerPoint Copilot Uploaded files work. Word desktop Copilot Attachments are recognized but reported as empty, corrupted, or unprocessable. Word for the web in Edge/InPrivate Tiny TXT attachment reported as empty, corrupted, or unprocessable. Word for the web attachment picker “No token obtained” message before file selection. Word for the web in Chrome SharePoint Foundation-style error with correlation ID 64062ea2-3083-8000-a0f7-fbf4f6bb617d. Word Copilot reading the active document Works normally. Troubleshooting already tried Updated Microsoft Office / Microsoft 365 desktop apps. Updated Windows. Restarted Word multiple times. Restarted the computer multiple times. Signed out and signed back in. Confirmed that the same Microsoft account is being used; there is only one Microsoft account involved. Toggled connected experiences off and back on, including restarts between changes. Started Word in Safe Mode. In Safe Mode, Copilot chat opened but did not activate properly; the Copilot pane appeared to cycle in the background and sub-windows were blank/unusable. Tested with a brand-new blank Word document in Word for the web. Tested in Edge, Edge InPrivate, and Chrome. Tested with very small TXT files as well as PDF and DOCX files. Confirmed OneDrive itself works normally in Chrome by uploading and accessing files successfully. Confirmed standalone Copilot and Excel/PowerPoint Copilot can process uploaded files successfully. Why this does not look like a local file or browser problem The same uploaded files work in standalone Microsoft 365 Copilot Chat, and OneDrive upload/download works normally. The issue also reproduces across Word desktop and Word for the web, across multiple browsers, and with a brand-new blank Word document. Because Word Copilot can read the active document but cannot acquire or process uploaded chat attachments, the failure appears isolated to the Word-integrated Copilot attachment picker, authorization-token acquisition, or OneDrive/SharePoint file-handoff path. Most likely failure area My current working theory is that Word-integrated Copilot is failing to obtain or pass the required SharePoint/OneDrive authorization token for Copilot chat attachments. The “no token obtained” message and the SharePoint Foundation correlation ID point toward the file-picker or backend handoff path rather than file contents. It may be account-specific, feature-flight/routing-specific, or a Microsoft-side regression affecting Word Copilot attachment handling. Request for help Has anyone seen Word Copilot attachments fail in this way while standalone Copilot, OneDrive, Excel Copilot, and PowerPoint Copilot all still work? Are there known Word Copilot attachment-picker, OneDrive/SharePoint token, or feature-routing issues that can affect only Word-integrated Copilot? If Microsoft support or engineering can trace backend logs, the most relevant correlation ID I have is 64062ea2-3083-8000-a0f7-fbf4f6bb617d from 8/4/2026 at 12:21:38 PM in Word for the web in Chrome. I would especially appreciate suggestions for anything beyond the standard local troubleshooting already tried. At this point, the pattern suggests the next useful step is probably backend investigation of the Word Copilot attachment/file-picker authorization flow rather than more file-format testing or local repair.
How to Avoid Tasks Copilot "You've reached our weekly Tasks limit"
I’ve been using both Chat‑Copilot (CC) and Tasks‑Copilot (TC) extensively, and I wanted to share a brief summary provided by TC, that may help others understand how each tool works, why TC sometimes stops responding, and how to avoid running into limits. ⭐ 1. Chat‑Copilot and Tasks‑Copilot serve different purposes Chat‑Copilot Real‑time conversational AI Great for brainstorming, drafting, coding, calculations, and iterative design Stateless — each message is processed independently Very stable and rarely gets stuck Tasks‑Copilot Designed for multi‑step workflows Can create and maintain documents Runs long‑lived background tasks Maintains persistent state More powerful for structured work More fragile because it depends on a task‑execution pipeline These two systems are independent. Chat can work perfectly even when TC is frozen. ⭐ 2. Why Tasks‑Copilot hits limits or becomes unresponsive TC can stop responding when: A task runs too long A multi‑step workflow fails mid‑execution The task state becomes corrupted The weekly quota system triggers The backend fails to reset on Friday Too many “pipeline‑style” requests are issued in a short time When this happens, TC may: stop responding entirely ignore all prompts remain stuck across all devices and browsers This is a backend state issue, not a browser or device problem. ⭐ 3. How to avoid triggering TC limits Here are practical ways to keep TC healthy: Use Chat‑Copilot for: brainstorming engineering design calculations drafting text generating diagrams or prompts step‑by‑step reasoning Chat handles these extremely well and never “uses up” TC capacity. Use Tasks‑Copilot only for: creating structured documents maintaining long‑form reports assembling multi‑section deliverables tasks that explicitly require persistent state Avoid these patterns in TC: “Build the entire document end‑to‑end” “Run this whole workflow” “Generate all sections at once” Rapid‑fire edits or repeated task triggers Very large or complex requests Instead, break work into small, single‑action steps. ⭐ 4. When TC gets stuck, what can users do? For consumer Microsoft 365 Personal accounts: There is no user‑accessible reset button Frontline support cannot reset TC’s task state Creating a business account does not fix the issue The only options today are: submit feedback post on the Tech Community wait for the backend to refresh This is a known limitation of the current TC preview. ⭐ 5. What would help users going forward A few improvements would make TC much more reliable: A user‑visible “Reset Task State” button Error messages instead of silent failures More predictable weekly resets Support tools that allow agents to clear stuck task containers
New Copilot update has made a chat inaccessible
I am experiencing an issue with a Copilot chat that appears to have become inaccessible after a recent update where the . This happened since Friday 21st August. I first noticed when all of my chats were migrated except one chat which is no longer visible in my chat history. I am logged into the same Microsoft account for the chat that is missing on which I created it. I have tried searching for it on the desktop app and in the browser with no luck. By some chance I had a Chrome browser tab open from an older Copilot session, which shows the older Copilot UI and the chat is there. The chat is fully functional: I can open it, view its history, send new messages, and receive responses. But this chat only is visible in the old UI and cannot be accessed in the new Copilot experience. The URL cannot be copied and pasted into a new tab because it redirects the copilot.microsoft.com URL to copilot.com and goes to a blank chat. The problem is if I close this browser tab, it will not be visible anymore. I have tried on the desktop app, a fresh browser tab, a fresh browser using incognito mode and even on mobile and on all of those, the new Copilot UI/Experience loads up without the chat I need. As part of my troubleshooting on the old Copilot Experience, I moved the chat to a "Project". But now I am unable to move it out of the "Project" And the new Copilot experience doesn't have a "Projects" section but instead a "Notebooks" section and I can't find it there either. You can see in both screenshots the UI is different. Because the chat now is in a Project it has a URL in the format: https://copilot.microsoft.com/projects/{project-id}/chats/{chat-id} Opening this URL on other devices or browsers redirects to the new Copilot experience and starts a new chat instead of opening the existing Project chat. As mentioned before on the new Copilot experience, this chat cannot be found anywhere else, even in the list "Chats". I can confirm that this is the same Microsoft account since my other chats have synced correctly. I have tested the URL on other browsers too with the redirect issue. The Project chat remains accessible and functional only within the old Copilot session. The chat I need contains an active, ongoing project. Although it remains accessible in the current browser tab, I have no reliable way to reopen it elsewhere, and I am concerned that if the session is lost or if I have to restart my browser or PC, I may permanently lose access to the Project chat and its accumulated context. Could you please investigate whether this Project chat is associated with an older Copilot experience, a migration issue, or a synchronisation problem between Project chats and the newer Copilot interface? Thanks, J
Integrating Copilot Studio Chatbot with Power BI Semantic Models for Natural Language KPI Queries
I am developing a Copilot Studio chatbot, and my goal is to enable users to ask for metrics or KPI-related information in natural language. The chatbot should then query existing Power BI semantic models (datasets) to retrieve the relevant data and provide answers. I do not want to rely on DAX or SQL queries directly the interaction should be conversational, with the chatbot translating user intent into queries against Power BI datasets. Currently, I am exploring the “Run query against Power BI datasets” capability and available tools, but I am stuck. I’m looking for guidance, best practices, or reference documentation that explains how to connect Copilot Studio with Power BI semantic models for natural language queries.
Copilot Chat Retention vs Memory: What Happens to Chat History Inferences?
How do Chat History inferences behave after tenant retention deletes the underlying Copilot interactions? Microsoft's documentation explains that: Saved Memories persist until explicitly deleted. Chat History personalization creates inferred details. Purview retention policies do not apply to Copilot Memory. What is unclear is the lifecycle of Chat History inferences when the Copilot interactions that originally contributed to those inferences are permanently removed by a tenant retention policy. Example: A tenant has a 60-day retention policy for Microsoft 365 Copilot interactions. Copilot infers user preferences from conversations. The source conversations are later removed due to retention. Does Copilot: Retain those inferred details? Recompute them from remaining conversations? Remove them because the source interactions no longer exist? Understanding this is important because users may experience changes in Copilot personalization without understanding why.
Copilot in OneNote cannot access content in sidebar (Microsoft 365 Premium)
a { text-decoration: none; color: #464feb; } tr th, tr td { border: 1px solid #e6e6e6; } tr th { background-color: #f5f5f5; } Hello everyone, I'm hoping someone from the OneNote or Copilot team can help with an issue that has prevented me from using Copilot in OneNote for approximately two months despite having an active Microsoft 365 Premium subscription. Issue Copilot can detect that a OneNote page is open, but it cannot access or read the contents of the page. For example, if I open a page named 1Cor4:1-16.onepart or create a brand-new test page, Copilot acknowledges that the page exists but responds with something similar to: "I can see that the file is open, but I cannot access the note contents." As a result, Copilot cannot summarize, analyze, answer questions about, or otherwise interact with the contents of the current page. Environment Microsoft 365 Premium (Personal Subscription) OneNote for Microsoft 365 Version 2608 Build 16.0.20326.20100 (64-bit) Windows Desktop Notebooks stored in and synced through OneDrive Troubleshooting Completed I have already performed extensive troubleshooting, including: Verifying my Microsoft 365 Premium subscription is active Verifying I am signed into the correct Microsoft account Signing out and back into Office and OneNote Confirming notebooks are syncing properly Updating Office and OneNote to the latest version Restarting OneNote and Windows multiple times Creating brand-new notebooks and test pages Testing across multiple days and sessions The issue is fully reproducible on both existing notebooks and newly created notebooks. Microsoft Support Findings I have already worked directly with Microsoft Support. A support technician remotely connected to my computer and reviewed my configuration. They confirmed that Copilot in OneNote should be functioning in my environment. During the support session they performed multiple troubleshooting and repair actions, including uninstalling and reinstalling components, repairing Office, and verifying account and licensing status. Despite all of this, the problem remained unchanged. The technician indicated that the issue appears to be on the Copilot/OneNote side rather than being caused by my local setup. Since they were unable to resolve it, they recommended that I post here in the Microsoft Tech Community to seek further escalation and visibility. Questions Has anyone else experienced an issue where Copilot can see the currently open OneNote page but cannot access the page contents? Is there a known service-side, provisioning, or feature-rollout issue that could cause this behavior? Is there a way to escalate this directly to the OneNote or Copilot engineering teams? At this point, I've been paying for the feature for roughly two months and have not been able to use the core OneNote Copilot functionality at all. Any assistance or guidance would be greatly appreciated. Thank you.A Guide to Prompt Coach
Prompt Coach is a ready-to-use Agent built by Microsoft, included with free Copilot (Copilot Chat) and Microsoft 365 Copilot subscriptions. Teaches how to write clear, structured prompts Reviews existing prompts and suggests improvements Creates high-quality prompts tailored to your context Checks prompts for compliance and fairness Note: Prompt Coach is not available with Microsoft personal subscriptions Why use Prompt Coach ⭐ You’re new to Copilot (or any Gen AI tool) and learning how to prompt ⭐ Your prompts aren’t giving the results you want ⭐ You want to create effective prompts on the first try rather than a “trial-and-error” approach ⭐ You want to build skills to write your own high-quality prompts How to access Prompt Coach Go to M365 home and you will find Prompt Coach under the list of Agents. Let's go through a scenario 👤 You are a Recruiter 📝 You’ve written a job description for a new role and want a quality review before publishing ❓ You are not sure what prompt to use 💡 You know the prompt should start with “Analyze the job description” Step 1 - Open Prompt Coach and ask Analyze my prompt and provide feedback on how I could improve it "Analyze the job description" Step 2 - Receive actionable feedback from Prompt Coach Step 3 - Get an improved prompt from Prompt Coach 💡Tweak and refine what Prompt Coach gives you to make the prompt match your voice, context and goals.
Seeking Guidance on Microsoft 365 Copilot Adoption Support for an Enterprise Customer
Hi Everyone, We are a newly enrolled Microsoft partner currently working with a customer to accelerate Microsoft 365 Copilot adoption across their organization. We are exploring how we can best support the customer and would like to understand whether there are any Microsoft programs, resources, partner managers, or engagement channels available to help us collaborate with Microsoft on Copilot adoption opportunities. Could anyone advise on: The recommended Microsoft channel/team to engage for an enterprise Copilot adoption opportunity Any Microsoft programs or resources available to support customer adoption How partners can collaborate with Microsoft for customer-specific Copilot adoption support Any guidance on the appropriate Microsoft team, program, or point of contact would be greatly appreciated. Thank you!Is there any benefit to using Bing for my default search if I have Copilot Premium?
Hi folks. I recently purchased Microsoft premium so I could use Copilot in Microsoft apps and I'm wondering if there is any benefit to switching to Bing for my default search in my browser instead of Google if I have the Premium features. Such as will it profile what I'm doing offering better/more catered to me answers when searching in Bing and using in Apps? Honestly I still find the Google AI answers better but since I have this Premium version of Copilot now, I want to leverage the premium features as much as possible. Thanks.
