Software Only Works With One User

You ran straight into DRM. Microsoft sold you a licensee to YOUR user.

 

Have you tried creating a new user account in addition to the existing account? I can understand why the Microsoft programs are doing it, but not all programs should be exhibiting this behavior.

 

Office should run for all the users on the computer. It's not licensed for only one user on a computer.

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Are you looking inside the Applications folder inside the top level of your disk, usually called Macintosh HD? You can also access this folder by typing command-shift-A when in Finder.
There is a separate Applications folder inside your own user account's home folder that is seldom used, and will generally appear empty. Any applications there will only be available for your own account, while applications installed to the main Applications folder will be available for all users on the computer.

 

When it comes to Microsoft, should and actually will are two totally different things.

 

Nonetheless, it isn't activated on a per-user basis.

 

I am aware. There clearly is a permissions issue as other non-Apple programs are exhibiting the same issue.