Dear experts,

I have a table with column A containing telephone numbers. My question is,
if I change or add some telephone numbers in column A, I'll fill the those
cells with red colour showing to all users about the change. I want those
cells with red colour change to no colour after 3 days automatically. Is it
possible? If yes, does it require a macro to do so or any other ways? Please
kindly advise.

Thanks in advance.