The Office Licensing Service keeps track of which users are licensed and how many devices they've installed Office on.Īfter you deploy Office, your users are prompted to activate Office the first time they use it. If you don't assign a user a license, you can still deploy Office to that user, but the user won't be able to activate and use Office on their Mac.įor Microsoft 365 (and Office 365) customers, Office for Mac activates by contacting the Office Licensing Service on the internet. If your organization has a Microsoft 365 (or Office 365) plan, make sure you assign each user a license for Office before you deploy Office to your Mac users. Activate Microsoft 365 versions of Office for Mac If you're an Office user trying to activate a personal copy of Office for Mac, follow these instructions instead of reading this article.