Official documentation checked October 14, 2026. Being able to open a SharePoint file does not guarantee that every Copilot feature can discover or process it. The failure can involve the account, the selected Copilot experience, search visibility, or a protection policy. Identify which layer fails before changing permissions. This guide covers Microsoft 365 work or … Read more
A Copilot request returning HTTP 401 indicates an authentication failure for that request. It does not, by itself, establish that your subscription expired or that a personal access token must be deleted. Check the account used by Copilot, refresh that session, and inspect the remaining evidence before changing credentials or network settings. Record the complete … Read more
If Copilot answers a question about your project with a generic explanation, start by checking whether the conversation can use your work data. A fluent answer is not proof that Copilot searched your tenant, and a generic answer does not by itself prove a permission failure. This guide covers Microsoft Copilot in a work or … Read more
Official documentation checked October 14, 2026. A timeout while Copilot works on a long Word document does not establish a fixed 4,096-token limit. Document complexity and the requested task can affect the result, while service, account, and connection problems can also interrupt a request. Save your document and preserve the prompt before retrying. Use a … Read more
Official documentation checked October 14, 2026. “Copilot couldn’t process your request” reports that the requested operation did not return successfully. It does not tell you whether the problem is a source file, the account, a client connection, or the service. Preserve the request and identify the exact feature before attempting resets. Why Copilot Displays the … Read more
Official documentation checked October 14, 2026. If Copilot’s chat list becomes empty after refreshing the browser, first confirm the account and experience you are using. An empty sidebar is not proof that the conversations were deleted, and deleting browser databases is not a guaranteed recovery method. Preserve any still-visible content through an approved private method … Read more
You open a Word document or a PowerPoint file, ask Copilot a question about the content, and it replies with something like “I can’t help with that” or “I don’t have access to your files.” This happens even though the file is open on your screen. The root cause is almost always a permissions or … Read more
When you use Copilot in Microsoft 365 apps, you may see a 429 error with the message Too Many Requests. This error stops Copilot from generating responses, summarizing documents, or answering questions. The cause is hitting a rate limit enforced by Microsoft to protect service stability. This article explains why the 429 error occurs and … Read more
When you ask Copilot to summarize an Outlook email thread, you might notice it leaves out certain messages. This happens most often with emails that contain attachments, inline images, or complex formatting. The root cause is how Copilot reads and interprets the content of each email in the thread. This article explains why Copilot skips … Read more
You ask Copilot in Word to draft a report, a proposal, or an email, and it stops mid-sentence or mid-paragraph. The generated text cuts off abruptly, leaving you with an incomplete draft. This truncation happens because Copilot has a fixed output token limit per generation, and it also respects the context window of the current … Read more