Hi all. I'm looking for a quick way to add the sender of an open email message to my contacts.

I'm getting this information for a friend of mine, who has Office 365 on a Windows 10 system. I don't have access to
such a setup, so I can't tinker around to find a solution. If someone here can tell me how to do this, I'll teach her
how in our next tandem session. Thanks.
-Paul