I am in the middle of doing an Exchange 2003 to Exchange 2010 rollout. My Exchange 2010 HA servers are up and running along side my acient Exchange 2003 server but I am having an issue either installing a new 2008R2 DC or even upgrading an exsisting 2003 SP2 DC to Server 2008.
If I attepmt to upgrade a 2003 SP2 DC to Server 2008 I am greeted with the following error telling me that " Active Directory on this domain controller does not contain Windows Server 2008 R2 ADPREP /FORESTPREP"
I am slightly confused because I thought I had to do this when I installed the Exchange 2010 servers.
So I jump over to my primary DC and run ADPREP /FORESTPREP and I get this message stating that "Forest-wide information has already been updated" and it quits.
I sync all of my domain controllers just to make sure everyone is up to date and I still get the error message when I attempt to update the 2003 server to 2008.
As a side note I have also buit a machine from scratch thinking that mayb e the previous Sys admin's did something funky that is preventing this from happening but I still get the errors.
Thanks for any and all help!