http://blogs.technet.com/b/chitpro-en/archive/2009/04/10/oldest-production-active-directory-domain-is-10-years-old.aspxJust saw this over on the AD blog . 10 years ago, Microsoft’s largest internal domain was upgraded to Windows 2000 becoming the first production Active Directory, and it’s still going strong… Dn: DC=redmond,DC=corp,DC=microsoft,DC=com whenCreated: 4/9en-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)