My application says Excel not found. What should I do?

Question: My application sent to a client says Excel not found. Can you advise on the fix?

Answer: 

This error may occur if the customer installed Office 365 over an older version of Office.

Tell them this:

Try performing a repair of your Office installation. If that doesn’t work, use the Scrub Office utility from Microsoft, then reinstall Office 365.
👉 Get the scrub utility here.