I'm currently working on an transition to exchange 2010 from 2003.
At the same time I want to decom an old 2003 dc. This 2003 dc happens to be a ca and the network file server and has exchange connectors on it.
At this point I have two new 2008 dc's added and the fmso role moved appropriately.(boths are GC's)
The domain is still running at the 2003 level. And I cannot decom the old dc until I moved or uninstall the ca service running on it.
What I am thinking is backup CA and remove service then to dcpromo and remove AD. Then reinstall the ca and import my back-up.
I am assuming dcpromo will remove the ad connectors preventing me from starting exchange 2010 install without harming my exchange 2003 enviroment. (not sure on this)
Once i have done this I should have my 2 2008 DC's running at 2003 level and be able to install the 2010 exchange and begin my transition from 2003.
Anyone with insite on this methodology? Pros cons ect?