I have a Domain that has three Windows 2003 DC's and 1 Windows 2008 Standard DC. I plan to add three Windows 2008 R2 DC's to this domain replacing the 2003 DC's and reimaging the 2008 Standard DC to 2008 R2. This is a child domain.
My question is what is the best practices way to go about this? Any issues or areas of concern I should know about? A detailed step by step answer would be great. Thx