Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
But it is not really the point whether you exceed it or not. I only have a subscription for one device. I am now forced by MS to continually stay signed in, but what if I don't want to and want to manually sign-out of office? I don't use many of the online features and would not care if they are gone, I just want to use Word to write what I need to and save it locally. Why sign-out? well maybe I don't enjoy my account being active all the time and my wife uses our same device and is now forced to look at my name and account plastered on Word to use it (yes, it is a minor inconvenience, but still annoying). There really is no reason for MS to keep you signed-in other then acquiring information on you (is my only guess), because they already have my money and know which device it is installed on as you need to install it while online (so it's not to check if you're using Office within your license limitation as they are able to check when installing).