title: Where does Excel get Username from in "Environ("Username")"? And how to edit it?
body: <p>I'm utilizing the <strong>Environ("Username")</strong> function in an excel file to determine the user that is logged in. But I thought that the username is being extracted from the mail id of the user logged in. But I have noticed that for some of my colleagues, the username and the mail id doesn't match. 
  That is when my colleague pointed out that the username in Environ("Username") and the Alias in Your info section*(Settings>Accounts>Your info)* in the Windows settings match.</p>
  
  <p><a href="https://i.stack.imgur.com/tNIRU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tNIRU.png" alt="Windows Settings&gt;Accounts&gt;Your Info"></a></p>
  
  <p>So I was wondering if this is where the Username is being extracted from, and if yes how can we edit it?</p>
  
  <p><em>P.S: this is in reference to an Office 365 account.</em></p>