Tommy_D wrote: » I failed the 640 last week and am retaking it tomorrow....I did really bad on the additional AD roles section, but I'm not finding alot of useful information in the book i've been using (Sybex the complete study guide MCTS Windows 2008 R2). Are there any online exercises or lab guides that I can use in my lab environment ot get a better feel for these? The microsoft technet articles seems to be alot of conceptual information where the test was asking very specific questions...