Articles

Writing about what has changed in Excel, and what to do about it. Not release notes and not a blog — a page goes here when something outside the add-ins changes what somebody has to do on a Monday morning.

For how to use a particular add-in, the guides are the place; each one runs the whole thing on a worked example.

Microsoft is retiring Excel’s COPILOT() function

The in-cell =COPILOT() function goes on 14 September 2026, about a year after it appeared and without ever leaving preview. The Copilot side pane remains and Microsoft points you at it — but it needs a paid Microsoft 365 Copilot licence, and it is a conversation rather than an answer that stays put beside the formula. What actually changes, and how to get a formula explained without a Copilot seat.

Read the article · Selection-Scoped Formula Explainer · The guide it points at