If you have an active Office 365 Home subscription, you can share it with up to four members of your household. Each household member you share your subscription with can use any of your available installs on their PCs, Macs, iPads, Android tablets, Windows tablets, iPhones®, or Android phones, get an additional 1 TB of OneDrive storage, and manage their own installs from www.office.com/myaccount.
To add someone to your subscription, visit www.office.com/myaccount and follow the onscreen instructions to add a user. Each person you add will receive an email with the steps they need to follow. Once they have accepted and completed the steps, their information, including the installs they are using, will appear on your My Account page. You can stop sharing your subscription with someone or remove a device they are using at www.office.com/myaccount.