I have a single Windows 2003 server running Exchange 2003 and it is healthy. I setup a second server with Windows 2008 on one virtual machine and a second windows 2008 for a second vm. The first vm I added as a Domain controller and setup this as the FSMO. Next I am trying to add Exchange 2010 to the second VM. I have been following all kinds of posts here but I keep coming back to the problem that Exchange will not install until I get the forest functional level up. Now I can see where my forest level is Windows 2003 but I guess I am missing something.
Here is what I continue to see.
To update the domain functional level, the Active Directory Domain Controllers in the domain must be running the appropriate version of windows.
Current domain functional level
Windows Server 2003
The following Active Directory Domain Controllers are running earlier versions of windows:
domain Name AD DC Version of Windows
iris.local mail-svr.iris.local Windows Server 2003 5.2 (3790)
As for the uprgrade path I am trying to follow this.
Can anyone help?