Copilot Chat allows paying Microsoft 365 customers to use the AI-powered chat feature in its Office software products, including Word, Excel, and PowerPoint.Microsoft says Office bug exposed customers’ confidential emails to Copilot AI. Microsoft has confirmed that a bug allowed its Copilot AI to summarize customers’ confidential emails for weeks without permission.The bug,allowed Copilot Chat to read and outline the contents of emails since January, even if customers had data loss prevention policies to prevent ingesting their sensitive information into Microsoft’s large language model.

