Hello all - I have a series of steps that I need to go through in order to implement Exchange 2010 into our domain and am looking for your expert assistance. First and foremost, I will describe my existing domain to give a bit of a background. Our domain started out with a single server running SBS2003, but currently, we've grown a bit, so right now the SBS2003 server is our domain controller and is also still running Exchange 2003. We have a new server on the network that is currently only acting as a file server, but we want IT to be our email server instead, and we want it to run Exchange 2010 as we have already purchased Exchange 2010. In regards to licensing, initially we only had 35 Small Business Server CAL's installed on our domain (since the SBS box was the only server we had for a very long time), however, I do not believe our domain is currently actively using the SBS Cal's. We have another server on the network that functions as a file server that is running Windows Server 2008 R2, and that particular server has 50 Server 2008 CAL's installed on it. I believe that our domain is pretty much using those CAL's for everything, but I"m not sure how to tell what I need to install on the 'new' server that will be running Exchange. I also have already purchased the necessary Exchange CAL's, but so far we have done nothing with the Exchange software (2010) or the associated Exchange licenses. Can you guys help me to perform a step by step "crossover" from the old SBS2003 Exchange 2003 box to the 'new' Exchange 2010 Box? There will not be any fancy setup nor will there be any front-end/back-end Exchange setup, we are simply moving this entire Exchange setup to the new server. Another thing to note is that at some point in the near future, (after the Exchange migration), we will also be decommissioning the Small Business Server for good and will also be implementing a new domain controller, actually a pair of them. There will be a physical Windows 2008 R2 server functioning as the primary domain controller, and a secondary virtual server will function as a secondary domain controller. Any and all help is very much appreciated in advance. Thanks, guys!