I currently have a MCDST cert and looking at going for my MCSA. I just found \nabout the 70-621 exam that upgrades my MCDST to a MCITP Enterprise Support \nTechnician. I am curious if taking the 70-621 exam would sub for the 70-620 \ncredit towards an MCSA as well as give me the MCITP Enterprise Support \nTechnician cert.\n\nAlso, what is the difference between the 70-621 and 70-620 exams? It seems \nthat most study material for the 70-621 exams lists what you would study for \na 70-620 exam. \n\nThanks for any info\advice!