Microsoft Office 365 _hot_ Download Center Portable Link

You have a "portable installer," not a portable app. The target PC will still have Office installed permanently, but you saved bandwidth.

Websites offering a 500MB "Portable Office 365" are usually: microsoft office 365 download center portable

If you are a business user, using unauthorized portable versions can open your company up to legal liabilities and security breaches. If the software bypasses activation, it is illegal to use. You have a "portable installer," not a portable app