Can anyone shed some light on this thread? We are running into the same issue. We have a single forest with a set of Exchange 2007 SP1 servers running in the forest root domain and a single Exchange Server 2003 machine in a subdomain.
The subdomain is managed by a separate division with their own IT department. We are attempting to migrate the 2003 server mailboxes and public folders in the subdomain to a new Exchange 2010 server in the subdomain. Exchange 2010
SP3 was used to update the schema. The account used for setup is a member of Enterprise Admins and has the Exchange Organization Administrators role assigned. The CAS and Hub Transport roles install successfully, the mbx role fails
with the error above. We are using the bits from Exchange 2010 SP3 to perform the installation. Deployment is dead in the water. Help!!