As the title stated, we were running an Exchange 2003 server that we knew was going down soon so we purchased a second server and installed Exchange 2010 into the AD. We managed to move all of the mailboxes off of 2003 and also managed to get the Offline Address Book setup on 2010. At this point the 2003 server bit the dust and will no longer boot. Therefore we were unable to properly uninstall Exchange and remove the last 2003 server so it still exists in AD. As far as the clients are concerned, everything is working properly.

However, when I run the Microsoft Exchange Profile Analyzer, I still see the old server and its Administrative Group. I am going to guess that since the old server is showing up in AD, I will not be able to raise Exchange or AD functionality (as the 2003 server was also the only AD DC) levels. I have forced the 2003 DC out of AD so that is no longer an issue.

Old Setup: Windows 2003 Server Enterprise & Exchange 2003 Standard
New Setup: Windows 2010 Server Enterprise & Exchange 2010 Standard

Two Questions:

• How do you go about manually forcing the 2003 server and its administrative group out of AD?
• When that is finished, where do you raise the Exchange mode (can't find this for the life of me)?