Question : Unable to reinstall Exchange 2010 after SP1 beta - existing Exchange 2003 environment

Originally had Exchange 2010 up and running nicely with Exchange 2003. We then applied the Exchange 2010 SP1 beta and nothing would work after that. Tried to uninstall Exchange 2010, was not able to. Eventually had to use ADSI edit to manually remove a few Exchange 2010 objects (I think it was Public Folders and a test mailbox), then took the Windows 2008 server off the domain, rebuilt it, renamed it, put it back on the domain.

Have been trying to reinstall (install) Exchange 2010 ever since to no avail. It is most likely an Active Directory problem but we're not sure where to go from here.

The current error during the install occurs at the Hub Transport Role stage:

Error:
The following error was generated when "$error.Clear(); if ($server -eq $null) { new-exchangeserver -DomainController $RoleDomainController -Name $RoleNetBIOSName }" was run: "Couldn't find the parent object for SPCAEMAIL on domain controller adpsrvr.w2k.vrbspca.bc.ca. Check that Servers exists and that the domain controller belongs to domain w2k.vrbspca.bc.ca.".

Couldn't find the parent object for SPCAEMAIL on domain controller adpsrvr.w2k.vrbspca.bc.ca. Check that Servers exists and that the domain controller belongs to domain w2k.vrbspca.bc.ca.

Previously have also received the following 2 errors, also at the Hub Transport install stage:

Error:
The following error was generated when "$error.Clear(); if ($server -eq $null) { new-exchangeserver -DomainController $RoleDomainController -Name

$RoleNetBIOSName }" was run: "Could not find the default Administrative Group 'Exchange Administrative Group (FYDIBOHF23SPDLT)'.".

Could not find the default Administrative Group 'Exchange Administrative Group (FYDIBOHF23SPDLT)'.


Error:
The following error was generated when "$error.Clear(); if ($server -eq $null) { Add-RoutingGroupMember -DomainController $RoleDomainController

-ServerName $RoleNetBIOSName }" was run: "Could not find the default Routing Group 'Exchange Routing Group (DWBGZMFD01QNBJR)'.".

Could not find the default Routing Group 'Exchange Routing Group (DWBGZMFD01QNBJR)'.


We have been following every lead we can find, but are still stuck. If anyone out there has some ideas of what to try next, we would be most grateful, thank you!

Some further information:

Exchange 2003 server is still running fine, but the whole reason for getting Exchange 2010 setup is that the old server needs to be replaced sooner rather than later. If hadn't blown it up by testing the SP1 beta would probably already be migrating all mailboxes over.

New Exchange 2010 server is 2008 64bit R2.

Running setup /prepareschema generates the following error:

Performing Microsoft Exchange Server Prerequisite Check

    Organization Checks              ......................... FAILED
     Setup encountered a problem while validating the state of Active Directory:
 The Active Directory schema version (14718) is higher than Setup's version (14622).
Therefore, PrepareSchema can't be executed.

Answer : Unable to reinstall Exchange 2010 after SP1 beta - existing Exchange 2003 environment

Ok do this.

Use the Setup Media for Exchange 2010 SP1 Beta.

Using that Media File run the following.

Setup,com /ps

Setup.com /p

Setup.com /pd

Once all these three commands run then.

Use the Setup Media File for Exchange 2010 to install Exchange 2010 RTM.

Let me know if this works for you.