I am installing Exchange 2010 SP1 on Server 2008 R2 SP1 for the first time in the domain. When I get to the Mail Flow settings screen, it will not let me continue until I select a server. Browsing does actually find a server, which used to run Exchange 2003, however we have not been running Exchange for several years, and this server is actually sitting in a store room gathering dust. I have checked DNS and it is free of entries for the decommissioned server, so I am confused about how Exchange setup knows that 3+ years ago it was out mail server. If I try to continue, the readiness checks fail with: Error: One or more servers in the existing organization is running Exchange 2000 Server. Please upgrade these servers to Exchange Server 2003 (or later) or remove them. Installation cannot proceed until existing Exchange 2000 servers are upgraded or removed. Click here for help... http://go.microsoft.com/fwlink/?linkid=30939&l=en&v=ExBPA.14&id=8723d75f-011a-4a50-9801-0c750af16c34 Error: Cannot find at least one domain controller running Windows Server 2003 Service Pack 1 or later in domain 'DC=bayviewglen,DC=ca'. This could be the result of moving domain controller objects in Active Directory. Check that at least one domain controller running Windows Server 2003 Service Pack 1 or later is located in the 'Domain Controllers' organizational unit (OU) and rerun setup. Click here for help... http://go.microsoft.com/fwlink/?linkid=30939&l=en&v=ExBPA.14&id=abd5c9be-a6b4-42db-bcab-0ad16f702601 On a related note, if I disconnect the server from the network during the setup, I am prompted for additional infomation such as the Organization Name, but I am not required to enter Mail Flow Serttings. After I finish the setup, and reconnect the network for the readiness checks, I still get the domain controller error. This is the first time I am installing Exchange, so if there is any extra information I can provide, let me know. Jonathan

hi, your old exchange server 2003 was not uninstalled properly and fully. from adsiedit - configuration - services - exchange server, under this step please check records for old exchange server and if there are records for it there delete all of them. and please look at these articles ; http://support.microsoft.com/kb/833396 http://www.msexchange.org/tutorials/remove-exchange-server-entire-exchange-organization.html http://www.msexchange.org/tutorials/removing-first-exchange-2003-server-part1.html after removing it restart your server and start installation of exchange 2010. regards,Mumin CICEK | www.cozumpark.com | Please click Vote As Helpful if it is helpful for you and Propose as Answer!!!

Thanks, This resolved both of the errors. Jonathan