Hey guys, I have a single DC running W2K3 SP2 and Exchange 2003 and I need to upgrade the Domain schema in order to introduce a second DC running W2K8. These are my questions: If I upgrade the Domain Schema what will happen with Exchange 2003? Can I upgrade with no major issues? May I have compatibility issues? I want to be sure that I won’t have any kind of problems. Thanks in advance!

Please see: (You'll be supported as long as Exchange 2003 is at minimum SP2) http://social.technet.microsoft.com/Forums/en-US/exchangesvrgeneral/thread/696d28bc-c269-4931-a7b2-f2d06e34f878 and the Domain and forest functional level matrix under: http://technet.microsoft.com/en-us/library/ff728623(EXCHG.141).aspx

Thank you very much!