How to check whether 2003 Domain Controller has been extended for adding 2008 DC? Share on Facebook Post on reddit Tweet on Twitter Share on LinkedIn Home › Forums › Microsoft Networking and Management Services › Active Directory › How to check whether 2003 Domain Controller has been extended for adding 2008 DC? This topic has 2 replies, 3 voices, and was last updated 9 years, 9 months ago by wullieb1. Viewing 1 post (of 1 total) Author Posts pavlenychMember Apr 27, 2011 at 5:03 am #154400 Hello. I have Domain based on Windows 2003. I need to add new DC’s with Windows 2008 installed. How can i check whether my existing DC based on Windows 2003 has been extended? Thanks. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.