I have a mutidomain domain forest w/ Exchange 2007 in the root forest domain (domain1) and Exchange 2003 in the 2nd domain (domain2). All servers so far are Server 2003.
Trying to install Exchange 2010 in domain2 on a newly added Server 2008 machine. This will eventually be the new domain2 Exchange server, we are transitioning domain2 from Exchange 2003 to Exhcange 2010.
The problem is when installing Exchange 2010 it complains the following (see below).
I can't run setup.exe /preparead on any of the domain1 servers. When ran from a 2003 x32 server on domain1 I get "setup.exe is valid, but for a machine type other than the current machine". It's complaining that it is not x64. OK so I move onto the Server 2003 x64 machine that Exchange 2007 is installed on which is also on domain1. This time I get "application failed to start because the file wer.dll was not found" Is there another way to run setup /preparead on domain1 without Server 2008?
Setup needs to contact the Active Directory schema master but this computer is not in the same Active Directory domain as the schema master (DC=domain1,DC=local).
Click here for help... http://go.microsoft.com/fwlink/?linkid=30939&l=en&v=ExBPA.14&id=2376fec1-b9ce-44db-beb6-cb9ac4788988
Setup encountered a problem while validating the state of Active Directory: Exchange organization-level objects have not been created, and setup cannot create them because the local computer is not in the same domain and site as the schema master. Run setup with the /prepareAD parameter on a computer in the domain domain1 and site Default-First-Site-Name, and wait for replication to complete.
Click here for help... http://technet.microsoft.com/en-US/library/ms.exch.err.default(EXCHG.141).aspx?v=22.214.171.124&e=ms.exch.err.Ex28883C&l=0&cl=cp