Microsoft has launched its AI assistant, Microsoft 365 Copilot, for select enterprise customers. The system, available for a $30 monthly premium per user, aims to revolutionize Office document creation and editing. Features include summarizing documents, generating emails, creating plans from notes, and enhancing Excel analysis. Despite a high entry price, Microsoft anticipates strong business interest, with Forrester Research predicting 6.9 million US knowledge workers will use the service by 2024.