www.office.com/setup
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Procedure to install and activate Office Setup on Computer
1) Start a web browser.
2) Go to www.office.com/setup. This will open the sign in page of Microsoft Office.
3) Select 'Sign in,' if you're logged out.
4) Enter your sign in details and proceed.
5) Now, enter your Office product key.
6) Then select your plan and Office version.
7) Wait for Office setup to download, after that double clicks on the setup file to install.
8) Go with the screen directions to finish the process.
9) Now, open the Office application you want to use and start your work.