From Microsoft website: [URL]http://www.microsoft.com/learning/en/us/certification/mcitp.aspx#tab2[/URL] MCITP: Enterprise Administrator Exam 70-640 Exam 70-642 Exam 70-643 plus either Exam 70-620 or Exam 70-6241 or Exam 70-680 and Exam 70-647 MCITP: Server Administrator Exam 70-640 Exam 70-642 Exam 70-646 I have a boxed book set with 70-640,642 and ***646*** but it seems according to Microsoft to become Enterprise admin, you need 643. Am I wasting my time taking 646. TIA.....