I have an environment with the following servers:
1) Two domain controllers running Server 2003 Standard 32 bit. One server is 1 1/2 years old and the other one is about 7 years old.
2) One member server running Server 2003 Standard with Exchange 2003, 32 bit
The Exchange server is 7 years old and needs to be replaced. I am going to purchase a new 64 bit server that will run Server 2008 R2 with Exchange 2010, 64 bit with 12 GB ram.
Instead of buying a replacement server for the 7 year old domain controller, can I promote the Exchange 2010 server to a domain controller, and retire the old domain controller?
If the Exchange 2010 server can become a domain controller, would there be any problems when I upgrade in the future to the new version of Exchange on another server?