Users of Chromebooks and tablets with screens larger than 10.1" will soon be unable to run full Microsoft Office Mobile apps free.
Larger devices will support a free version of Office that works as a document viewer, but will be unable to print, edit or create documents without an Office 365 subscription.
Android apps first became available for Chromebooks in June this year, but Microsoft has only just announced that it will be limiting its free apps.
"On devices larger than 10.1 inches, an Office 365 subscription is required to unlock the ability to create, edit, or print documents," the company said in a statement to 9to5 Google.
The news is an extension of Microsoft s existing policy on screen size, which attempts to distinguish between mobile devices that are only suitable for personal use, and full-fat devices that can be used professionally.
"Based on our research, we are classifying anything with a screen size of 10.1" or less as a true mobile device, Microsoft explained when it made its decision.