“Can’t verify The Signature” installation error in office 365/2021/2019

Productivity in the fast-paced environment in modern offices depends on smooth communication and document exchange. But sometimes users get frustrated when they see an error saying, "Couldn't install, we're sorry, but we can't verify the signature." This is especially valid when the user tries to check the signatures. We shall examine the causes of signature verification problems in office software in this post.