Want to check on how many devices you have installed your Office 365 subscription? This is possible with a feature called Deactivate install feature available with your Office 365 user profile.
So if you have an Office 365 subscription, you can deactivate an Office install that you're no longer using so you can install Office on a different device. This is different from uninstalling Office, which doesn't deactivate the install. As Microsoft has a limit of installing Office 2016 subscription up-to 5 devices for a single user, this feature helps us keep track of our limits. Now watch this video and learn how you can do this.