Microsoft Office Home and Student 2016 is a permanent license (for Windows).
To download and install Office 2016, you can install Office associated with your Microsoft account without knowing your product key.
Here, we will explain the procedure for installing "Office Home and Student 2016".
Enter the Microsoft account for office installation, enter the password and sign in.
If you don't have a Microsoft account: you need to create a new one.
On the next screen, enter the issued 25-character product key and click Next.
When the download is complete, you will see the following screen. Click Close.
Activate by opening Excel and signing in with your Microsoft account.
Be sure to enter the Microsoft account for which you have set up the protect key as the Microsoft account to sign in.