unable to install Exchange 2010 in an already existing exchange 2003 infrastructure

Hi to all

I'm in the middle of a transition from exchange 2003/ AD 2003 to Exchange 2010 / AD 2008r2. I followed various articles and I started adding a 2008r2  DC. The operation completed successfully.

Right now I'm trying to install an exchange 2010 server as a Client Access Server, but before the setup can start I receive the following from setup /prepareAD
    Organization Preparation                                  FAILED
     The following error was generated when "$error.Clear();
        install-RootOrganizationContainer -DomainController $RoleDomainControlle
r

" was run: "Couldn't find the Enterprise Organization container.".

note that setup /prepareschema and setup /pl worked smoothly.
last info: I'm tryng to install on the 2008 DC

From the Exchange Setup Log
[04/25/2011 13:30:23.0960] [1] Executing:
      install-RootOrganizationContainer -DomainController $RoleDomainController


[04/25/2011 13:30:24.0007] [2] Active Directory session settings for 'Install-RootOrganizationContainer' are: View Entire Forest: 'True', Configuration Domain Controller: 'WS00ARC011.contoso.it', Preferred Global Catalog: 'WS00ARC011.contoso.it', Preferred Domain Controllers: '{ WS00ARC011.contoso.it }'
[04/25/2011 13:30:24.0007] [2] Beginning processing install-RootOrganizationContainer -DomainController:'WS00ARC011.contoso.it'
[04/25/2011 13:30:24.0022] [2] Couldn't find the Enterprise Organization container.
[04/25/2011 13:30:24.0022] [1] The following 1 error(s) occurred during task execution:
[04/25/2011 13:30:24.0022] [1] 0.  ErrorRecord: Couldn't find the Enterprise Organization container.
[04/25/2011 13:30:24.0022] [1] 0.  ErrorRecord: Microsoft.Exchange.Data.Directory.SystemConfiguration.OrgContainerNotFoundException: Couldn't find the Enterprise Organization container.
   at Microsoft.Exchange.Data.Directory.SystemConfiguration.ADSystemConfigurationSession.GetRootOrgContainerId(String fqdn, NetworkCredential credential)
   at Microsoft.Exchange.Configuration.Tasks.NewTenantADTaskBase`1.InternalBeginProcessing()
   at Microsoft.Exchange.Configuration.Tasks.Task.BeginProcessing()
[04/25/2011 13:30:24.0022] [1] The following error was generated when "$error.Clear();
      install-RootOrganizationContainer -DomainController $RoleDomainController

" was run: "Couldn't find the Enterprise Organization container.".
[04/25/2011 13:30:24.0022] [1] Couldn't find the Enterprise Organization container.
[04/25/2011 13:30:24.0022] [1] [ERROR-REFERENCE] Id=CommonGlobalConfig___ffa0b8877529439fbe22f0454a3a429d Component=EXCHANGE14:\Current\Release\Shared\Datacenter\Setup
[04/25/2011 13:30:24.0022] [1] Setup is stopping now because of one or more critical errors.
[04/25/2011 13:30:24.0022] [1] Finished executing component tasks.
[04/25/2011 13:30:24.0038] [1] Ending processing Install-ExchangeOrganization
[04/25/2011 13:30:24.0038] [0] The Exchange Server setup operation didn't complete.  More details can be found in ExchangeSetup.log located in the <SystemDrive>:\ExchangeSetupLogs folder.
[04/25/2011 13:30:24.0053] [0] End of Setup
[04/25/2011 13:30:24.0053] [0] **********************************************
luigiroccoAsked:
Who is Participating?
 
luigiroccoAuthor Commented:
I found the solution:

there was inside the lostandfoundconfig container in configuration partition a copy of the exchange server container. When I deleted it, the setup process (setup /prepareAD, /preparedomain) completed successfully. Thank you very much for your support
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Muzafar MominCommented:
you will need a user ID having Enterprise Admin rights to run AD prep and for schema prep
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luigiroccoAuthor Commented:
I have, I'm using the Default administrator account, and it's Entersprise admin
thanks
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Making Bulk Changes to Active Directory

Watch this video to see how easy it is to make mass changes to Active Directory from an external text file without using complicated scripts.

 
Muzafar MominCommented:

use run as administrator on CMD and execute the prep commands
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Muzafar MominCommented:
if it still failes then Download Exchange Pre Deployment Analyzer and let this tool guide you to proper direction

http://www.microsoft.com/downloads/details.aspx?FamilyID=88b304e7-9912-4cb0-8ead-7479dab1abf2&displaylang=en

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luigiroccoAuthor Commented:
Hi

I alredy launched it, I receive 2 warnings and no errors
warnings are
1) Exchange Development Kit (EDK) connector 'FAXmaker:i386 (WS00ARC005)' was found in the organization. Exchange Server 2010 does not support EDK connectors. This connector will need to remain on existing Exchange 2003 servers.
2) Before introducing Exchange Server 2010 into this topology, the 'SuppressStateChanges' configuration parameter should be set to '1' on server ws00arc010.arconsulting.it. This parameter is essential if you plan to create multiple connectors to the dedicated Exchange 2010 routing group
nothing tied to the error reported

thanks
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Muzafar MominCommented:
did you tried restarting domain Controllers and then the new server (exchange 2010) and then run the perp commands
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luigiroccoAuthor Commented:
I used the adsiedit tool to check if the configuration folder exists: it is there under
CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=contoso,DC=it;

according to technet
the container must be:
CN=<Organization Name>,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=<root domain>

I don't know what to do
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Muzafar MominCommented:
Excellent  :)
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Muzafar MominCommented:
luigirocco: dont forget to accept the solution which every is applicable to close the question
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luigiroccoAuthor Commented:
THanks for suggestion, but since I've got it by myself, I suspected that to accept my own solution will be unfair. What you suggest?
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luigiroccoAuthor Commented:
correct answer
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