I currently have 6 servers. One of them is a very old SBS 2003. I would like to retire the SBS 2003. All of my other servers are also MS Server 2003 except my newest server which is MS Server 2008. I have moved MS Exchange to the Server 2008. My next step is to move active directory, DC, DNS, DHCP. I can move these services to a Server 2003, but I was considering moving them to Server 2008 with the Exchange services. As I understand it the security on the server 2008 box is better, I already have licensing for the 2008 box and I will not have to move Active Directory or Domain Controller services for a long time. A person I was talking with told me Microsoft does NOT recommend Active Directory be put on the same box with Exchange for security reasons. Recommendations????