Image: MicrosoftMicrosoft’s 365 Copilot AI a**istant is now available for certain enterprise customers. Microsoft is quietly launching its Microsoft 365 Copilot system for a $30-per-month premium per user, but enterprise customers will need to commit to at least 300 users and pick up the phone to Microsoft to get on the list to access this new AI-powered a**istant that Microsoft promises will change the way Office documents are created and edited.Businesses willing to pay the premium will be able to use Microsoft 365 Copilot to summarize documents, generate emails, create plans from notes, and even improve Excel a***ysis. More than 600 enterprise customers have been testing Microsoft 365 Copilot during a paid early access program in recent months. M…