title: What is the difference between User Logon name and Pre-Windows 2000 logon name during the User creation in Windows Server Active Directory?
body: <p><a href="https://i.stack.imgur.com/l9a6z.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/l9a6z.png" alt="enter image description here"></a></p>
  
  <p>The New User Object creation window has two text fields, one for User logon name and other for User logon name (pre-Windows 2000).  What is the difference between these two logon names? What significant role do they play in Active Directory working?</p>