Copilot unavailable for other Outlook accounts and Defender won’t activate after Windows repair
Hello, I am posting here because Microsoft Chat Support directed me to the Tech Community after previously escalated support cases failed to resolve two issues with my Microsoft 365 subscription: Copilot works with my Microsoft account in New Outlook, but is unavailable when using other accounts within the same application. The Microsoft Defender app will not activate on my computer. To be clear, Copilot is not completely unavailable: it works with my Microsoft account. The unresolved issue concerns its availability for the other accounts added to New Outlook. Troubleshooting and support history I have already worked with Microsoft Support, including the Escalation Team. At their direction, I completed a repair installation of Windows 11. Both issues remain unchanged. In my latest chat, the support representative reviewed the case history and explicitly confirmed that all applicable troubleshooting steps had already been performed, including the Windows repair installation. Despite this, I was repeatedly directed to this forum. My requests to reconnect with the Escalation Team or continue the existing investigation were not accommodated. What I need clarified and investigated I suspect there may be an account-side subscription or entitlement issue, but this has not been confirmed. I need someone to establish the actual cause rather than repeat troubleshooting that has already failed. Specifically: Is Copilot supposed to be available for the additional accounts in New Outlook under my subscription? If there are restrictions, please identify exactly which subscription requirements or account limitations apply. Why will the Microsoft Defender app not activate, and can Microsoft verify whether the relevant subscription entitlement is correctly associated with my account? If an account-side investigation is required, how can my existing case be returned to the appropriate Microsoft support team? If these two symptoms have separate causes, please address them separately. I understand that community contributors cannot access my private account or internal support records. If the investigation requires that access, I need a clear route to a Microsoft team that can take ownership. I can provide my existing case reference through an appropriate private support channel. After completing an operating system repair at Microsoft’s request, I am understandably frustrated to be redirected to a public forum without a resolution or a clear escalation path. I am paying for this subscription and expect a concrete explanation of what should work, what is failing, and how it will be resolved. Please help me move this investigation forward without restarting the same troubleshooting cycle. Thank you, Christer FMicrosoft Copilot 365 Personal Premium limits
In my Copilot Notebook, I deliberately loaded 20 PDF files in order to test Copilot’s grounding behavior across the full set of available references. At the time this testing setup was created, 20 references represented the effective grounding limit described for Copilot Notebooks, meaning that these references were expected to form the source base used by Copilot when generating grounded responses. The references consisted of fully functional, original academic textbooks containing relevant and up-to-date scientific information, mostly published within the last ten years. Importantly, the sources do not differ from one another in terms of accessibility, file type, availability, or how they were added to the notebook. They are all PDF files, they are all available in the same environment, and there is no obvious difference in access conditions that would explain why some are consistently used while others are repeatedly treated as inaccessible, unavailable, summarized, or skipped. The purpose of the test was therefore not simply to see whether Copilot could access 20 files, but whether it could actually ground its answers in the complete reference set when explicitly instructed to analyze all available sources. Despite this, in approximately 99.9% of my tests, Copilot appears to ground its responses in only 3 to 5 of the 20 available references, often repeatedly using the same documents. When I ask what happened to the remaining sources, Copilot gives different explanations. Sometimes it says that it does not have access to certain files. Sometimes it says that it only received a summary of the file. Sometimes it says that a step involved in retrieving or processing the information failed. The way Copilot explains this often makes it sound as if access to the uploaded files depends on some external or intermediate system, rather than being something Copilot itself can directly control. This is difficult to understand from a user perspective because the files are already uploaded into the Copilot environment and were specifically provided as source material for analysis. The practical result is that a task explicitly requesting analysis of 20 sources often produces an answer based on only 3 to 5 of them. For academic or research use, this is a serious limitation. If 15 to 17 out of 20 carefully selected sources are not actually examined, then the final synthesis cannot realistically represent the full source base. This also creates uncertainty about what Copilot means when it claims to have used the provided materials. My question to Microsoft is: Is there a technical limit on how much information Copilot can actually retrieve, open, and analyze from uploaded files during a single task or session? If such a limit exists, what is that limit? And why, when 20 valid PDF sources are uploaded and Copilot is explicitly instructed to analyze all of them, does it so often appear to open only 3 to 5 files, while describing the others as inaccessible, summarized, or unavailable because some retrieval step failed?
Excel Copilot WebView2 crashes when rendering download links - Bug
Environment: Excel for Microsoft 365 (Desktop) Windows 10/11 - Enterprise account Issue: Excel Copilot's WebView2 panel goes completely black/blank when attempting to render download links for files generated in the Python sandbox. Steps to Reproduce: Open Excel with Copilot Ask Copilot to perform any task that generates a download link (e.g., "create a test file and give me a download link") WebView2 panel turns black immediately What I've Tried: Clearing WebView2 cache at: %LOCALAPPDATA%\Microsoft\Office\16.0\Wef\webview2\ Copilot works normally after cache clear UNTIL a download link is requested Issue is reproducible every time Workaround: Asking Copilot to write results directly to sheets instead of generating download files works fine. This started after an Excel crash during a Copilot session.
copilot app is unable to edit an excel file and save a new version
I asked copilot to review an excel file I created and add worksheets with dashboard etc; it does the analysis, suggests the solution but when I ask to save a new edited version comes up with all kinds of limitations.. example of message : I need access to the physical workbook file in the execution workspace, not just the extracted workbook content that I can read. What I currently have is access to the contents of "book2" , including all sheets and rows What I do not have is a file path that allows me to save a modified workbook and return a new Excel file. This is exactly the distinction you were asking about earlier: ✅ I can inspect and analyse "book2". ✅ I can design the full V2 architecture you specified. ❌ In this session I cannot yet create and return the modified .xlsx because the actual uploaded file is not available in the workbook-editing workspace. I save files on OneDrive and have MS365 Family subscription , similar limitations with all MS files is it a licence issue?
How does ERP MCP determine F&O environment?
How does the Dynamics 365 ERP MCP Server determine the target Finance & Operations environment when multiple environments (SIT, UAT, and Production) have MCP enabled? In Copilot Studio, the MCP connection only shows the authenticated user and does not expose any environment selection or environment identifier. Is the target F&O environment determined by the underlying Power Platform connection, the MCP client registration, a connection reference, or another routing mechanism? How can administrators verify which F&O environment an MCP-enabled agent is actually connected to?Microsoft 365 Copilot, data from D365 Sales through Business Applications in Work IQ (Preview).
We're looking to enable Microsoft 365 Copilot to surface and ground responses using data from Dynamics 365 Sales through the new Business Applications in Work IQ (Preview). We've followed Microsoft's guidance and completed the configuration required to enable the integration. While the feature looks to be configured correctly, we're not seeing the expected Dynamics 365 Sales data being returned within Microsoft 365 Copilot. Has anyone seen this too?
Issue with Copilot
Issue Report: Plotting Engine Fails to Generate Charts Summary The chart‑generation feature in Copilot intermittently fails to produce output. When requesting visualizations such as radar charts, bar charts, histograms, or other plotted graphics, Copilot often returns an empty result with no error message or explanation. Observed Behavior Requests for plotted charts sometimes return "" (empty output). No error message is provided, making troubleshooting impossible. The failure occurs even with simple, valid datasets and straightforward instructions. Conceptual or AI‑generated diagrams work consistently; only plotted charts fail. Expected Behavior Copilot should reliably generate charts when provided valid data and instructions, or provide a clear error message if the request cannot be completed. Impact This issue prevents users from visualizing structured datasets and reduces confidence in Copilot’s ability to produce quantitative graphics. It also forces users to retry multiple times or switch to non‑chart visualizations. Request Please investigate the stability of the chart‑generation environment, particularly around sandbox execution and rendering reliability. Adding explicit error messages when chart generation fails would also significantly improve usability.Access Issue: Copilot Agent Kit for Makers, Users cant access through Microsoft security group
Copilot Agent Kit for Makers where users granted access through a Microsoft security group can access the application, but cannot see your organization's custom templates within the Agent Library. If i individually assign the user then they are able to see it. Few more things Both the security group and individually assigned users have the Basic User and CSK - Maker roles. The issue occurs when access is provided through the security group, while direct user assignment works. The same security group works as expected for access to the customer's Copilot Studio agents.
Which Accessible Source Can Reliably Return Current Date, Time, Timezone and UTC Offset?
Question for Microsoft 365 Copilot experts I am trying to implement a reliable "Current Time Validation" control inside a Microsoft 365 Copilot workflow. The requirement is to obtain a machine-readable and repeatable timestamp containing: - Current date - Current time - Time zone identifier - UTC offset For example: 2026-09-16T18:09:00+08:00 Timezone: Asia/Shanghai UTC Offset: +08:00 My goal is not a human-readable world clock page, but a source that Microsoft 365 Copilot can actually access and consume reliably during execution. Business context: The timestamp is used as a mandatory validation gate before generating operational reports. If the timestamp is wrong, downstream conclusions may become invalid because greetings, operating-hours logic, OOO/PTO analysis, and action ownership are all time-dependent. Problems encountered so far I have already tested several approaches and found multiple reliability issues: 1. Conversation context is not a reliable clock source. Copilot may retain or reuse a timestamp from the beginning of a conversation rather than reflecting the actual current time. 2. External "current time" web pages are problematic. Some sites appear to return cached/indexed content when accessed through Copilot, producing timestamps that are clearly inconsistent with real-world elapsed time. 3. Human-readable sources are insufficient. I need a source that returns structured data which can be validated programmatically. 4. Timezone information alone is not enough. The solution must provide: - current date - current time - timezone identifier - UTC offset 5. The source must be repeatable. Two consecutive queries should return updated timestamps reflecting actual elapsed time. Questions 1. Among the data sources that Microsoft 365 Copilot can realistically access today, which source can provide: - date - time - timezone - UTC offset in a machine-readable format? 2. Is there any Microsoft-native source (Microsoft Graph, Outlook, Exchange Online, mailbox settings, tenant settings, calendar services, etc.) that exposes this information directly? 3. Which source would be considered the most reliable and repeatable for workflow-validation purposes? 4. Has anyone implemented a trusted "current time authority" pattern for Microsoft 365 Copilot or Copilot Studio agents? 5. Does Microsoft 365 Copilot have access to a real-time clock source that is guaranteed to be refreshed at query time rather than returning indexed or cached timestamp information? The objective is to establish a trusted and auditable timestamp before generating business reports, task summaries, or workflow decisions. Thanks in advance.Copilot chats listed, but no longer available.
After installing the latest Copilot (September 2026) some of my chats have become corrupted. In the Android phone app, the Windows 11 app and on copilot.microsoft.com they are listed, but impossible to open delete or rename. I get : "This chat is no longer available". I have several older and newer chats that work just fine. I think the ghosts was created the same day as the new version was installed on my phone. The automatic installation process did not work well. Had to uninstall and manually reinstall from Google Play. I have chatted with Microsoft Support about it, and they admit it may be a server-side problem. Is there anybody with a similar problem? Or maybe somone has a solution? That would be great!