– one user who can sign-in to Office software on five devices at the same time. Office will only fully activate on the current five logins you make from the software. Office software/apps can be installed on as many computers/devices as you like. It will only work in a very limited way (Viewing and Printing) until someone signs-in again. When you sign-out of Office on a computer, that software is deactivated. If you are a subscriber, then Microsoft will allow your Office software to run with all the features. Office will check with Microsoft’s servers to see if your Microsoft account is linked to a current Office/Microsoft 365 subscription. Microsoft will keep a count on how many sign-in you have at any time.Įach sign-in will activate the Office software. You’ll be able to use Office on up to FIVE devices/computers at a time.