Cost · 07
Chat and Copilot are different bills
Microsoft Learn's requirements page draws a licensing line. Microsoft Copilot needs a Copilot licence and a qualifying base licence. Microsoft Copilot Chat is available with an eligible Microsoft 365 subscription, and the Copilot licence is not required for that chat. Mixing the two without a rule is how a company new to AI pays for seats that quiet users never needed, or expects Graph-grounded work from an entitlement that does not include it.
What each one is for
Chat is the route to a question, a lookup, a draft. Microsoft Copilot, in Learn's feature table, is the work-grounded experience in the apps: Word, Excel, Outlook, Teams and the rest, when the licence is present. Office in Copilot, announced on 25 September 2026, produces an editable file inside that Copilot experience.
Device licences do not cross the line
The same Learn requirements page says Microsoft Copilot is not available with device-based licensing for Microsoft 365 Apps for enterprise. A shared PC licence is not a Copilot seat. If your rollout plan counts devices, recount people.
Give the rule a sentence
People who ask occasional questions can stay on Chat. People who will live in the apps, or who will be asked to produce the files, need the Copilot licence, and a reason. FrontierOrg, fiction, refuses to treat a licence that is merely present as permission to run a pilot.
Monday
Count three numbers: people with Copilot Chat only, people with a Microsoft Copilot licence, and people whose only Microsoft 365 Apps licence is device-based. Do not brief adoption until those counts exist.
Who in the team is about to be given a Copilot seat because a neighbour has one?
Sources: Microsoft Learn, Microsoft Copilot requirements (opens in a new tab). Microsoft Learn, E3, E5 and E7 licence features (opens in a new tab).
Where this note mentions FrontierOrg, that is a fictional method for rehearsing a decision. It is not a company, not a client, and not a case study.