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
You are in the middle of a detailed conversation with Copilot in Microsoft 365 when the session stops responding. A banner appears at the top of the chat pane: Connection Lost. This error is most common in long conversations that involve multiple file uploads, complex document summaries, or iterative code generation. The root cause is … Read more
When you ask Copilot a question in Microsoft 365 and it replies only with the message “Content filtered” and no actual output, you cannot see the answer you requested. This problem typically happens because Copilot’s built-in content moderation system flagged your prompt or the generated response as violating a policy rule, and it blocked the … Read more
Copilot in Excel can misidentify table headers when analyzing data, returning incorrect column names or treating data rows as headers. This happens because Copilot relies on Excel’s structured table metadata rather than visual formatting alone. A table must be formally defined as an Excel table, not just formatted with bold text or colored cells. This … Read more
When you try to use Copilot in Microsoft 365 and see a 500 Internal Server Error, your work stops. This error means the server that processes your Copilot request cannot complete the action. It can happen in any Microsoft 365 app like Word, Excel, or Teams. This article explains why the 500 error occurs and … Read more
You ask Copilot a work question inside Microsoft 365 apps. It replies with a generic refusal: I cannot help with that. This happens even when the request is valid and within your organization’s data policies. The root cause is often a mismatch between Copilot’s grounding configuration and the data source you are trying to query. … Read more
When you chat with Copilot in Microsoft 365 apps, the assistant may forget what you said a few messages ago. This happens because Copilot has a limited context window that resets after a certain number of turns. The context window is the amount of recent conversation history the model can reference at once. This article … Read more
You see the error message File Type Not Supported when you try to upload a document to Copilot in Microsoft 365 Chat or Copilot in Word. This error occurs because Copilot can only process a specific set of file formats for grounding and content generation. The file you are uploading uses an extension or encoding … Read more