Starting Exchange 2007 setup on Server 2008, cannot complete the setup /preparead step, it fails with: D:\>setup /prepareadWelcome to Microsoft Exchange Server 2007 Unattended SetupPreparing Exchange SetupNo server roles will be installedPerforming Microsoft Exchange Server Prerequisite CheckOrganization Checks ......................... COMPLETEDConfiguring Microsoft Exchange ServerOrganization Preparation ......................... FAILED An error occurred. The error code was 3221692829. The message was The requested object has a non-unique identifier and cannot be retrieved.. The Exchange Server Setup operation did not complete. For more information, visit http://support.microsoft.com and enter the Error ID.Exchange Server setup encountered an error. My log files show:# Tasks for 'Common Global AD Configuration' component# [ID = d894d3ce, Wt = 1, isFatal = True] "Upgrading existing exchange objects."BuildToBuildFix-ExchangeObjectVersion -DomainController $RoleDomainController# [ID = b90cee5e, Wt = 1, isFatal = False] "Creating Exchange configuration objects in Active Directory"if ((Get-OrganizationConfig).ObjectVersion -lt 10649) { Get-OfflineAddressBook | foreach { if ((Get-ExchangeServer $_.Server.ObjectGuid.ToString()).IsExchange2007OrLater) { $_ | Set-OfflineAddressBook -DiffRetentionPeriod:30 } } }# [ID = 196e023e, Wt = 1, isFatal = True] "Creating Exchange configuration objects in Active Directory"buildToBuildUpgrade-ExsetDataAtom -AtomName OrgLevelCt -DomainController $RoleDomainControllerThen at the end of the Exchangesetup.log:[7/10/2009 9:36:34 AM] [2] Leaving ScHavePermissionToCreateDSObject[7/10/2009 9:36:34 AM] [2] Configuring administrative rights[7/10/2009 9:36:34 AM] [2] Entering ScInstallLDIFScript[7/10/2009 9:36:35 AM] [2] Leaving ScInstallLDIFScript[7/10/2009 9:36:35 AM] [2] szLookupServer = '(null)' CTrustee::ScLookupName (f:\08.01.0240\sources\dev\admin\src\libs\logic\security2.cxx:1014) Error code 0XC007219D (8605): The requested object has a non-unique identifier and cannot be retrieved.[7/10/2009 9:36:35 AM] [2] szLookupServer = (null) CTrustee::ScInit (f:\08.01.0240\sources\dev\admin\src\libs\logic\security2.cxx:321) Error code 0XC007219D (8605): The requested object has a non-unique identifier and cannot be retrieved.[7/10/2009 9:36:35 AM] [2] CAce::ScImport (f:\08.01.0240\sources\dev\admin\src\libs\logic\security2.cxx:2245) Error code 0XC007219D (8605): The requested object has a non-unique identifier and cannot be retrieved.[7/10/2009 9:36:35 AM] [2] CAcl::ScImport (f:\08.01.0240\sources\dev\admin\src\libs\logic\security2.cxx:2598) Error code 0XC007219D (8605): The requested object has a non-unique identifier and cannot be retrieved.[7/10/2009 9:36:35 AM] [2] CExSecurityDescriptor::ScImport (f:\08.01.0240\sources\dev\admin\src\libs\logic\security2.cxx:3567) Error code 0XC007219D (8605): The requested object has a non-unique identifier and cannot be retrieved.[7/10/2009 9:36:35 AM] [2] CExSecurityDescriptor::ScReadFromDob (f:\08.01.0240\sources\dev\admin\src\libs\logic\security2.cxx:4133) Error code 0XC007219D (8605): The requested object has a non-unique identifier and cannot be retrieved.[7/10/2009 9:36:35 AM] [2] CExSecurityDescriptor::ScAddAcesToDob (f:\08.01.0240\sources\dev\admin\src\libs\logic\security2.cxx:4520) Error code 0XC007219D (8605): The requested object has a non-unique identifier and cannot be retrieved.[7/10/2009 9:36:35 AM] [2] szLookupServer = '(null)' CTrustee::ScLookupName (f:\08.01.0240\sources\dev\admin\src\libs\logic\security2.cxx:1014) Error code 0XC007219D (8605): The requested object has a non-unique identifier and cannot be retrieved.[7/10/2009 9:36:35 AM] [2] szLookupServer = (null) CTrustee::ScInit (f:\08.01.0240\sources\dev\admin\src\libs\logic\security2.cxx:321) Error code 0XC007219D (8605): The requested object has a non-unique identifier and cannot be retrieved.[7/10/2009 9:36:35 AM] [2] CAce::ScImport (f:\08.01.0240\sources\dev\admin\src\libs\logic\security2.cxx:2245) Error code 0XC007219D (8605): The requested object has a non-unique identifier and cannot be retrieved.[7/10/2009 9:36:35 AM] [2] CAcl::ScImport (f:\08.01.0240\sources\dev\admin\src\libs\logic\security2.cxx:2598) Error code 0XC007219D (8605): The requested object has a non-unique identifier and cannot be retrieved.[7/10/2009 9:36:35 AM] [2] CExSecurityDescriptor::ScImport (f:\08.01.0240\sources\dev\admin\src\libs\logic\security2.cxx:3567) Error code 0XC007219D (8605): The requested object has a non-unique identifier and cannot be retrieved.[7/10/2009 9:36:35 AM] [2] CExSecurityDescriptor::ScReadFromDob (f:\08.01.0240\sources\dev\admin\src\libs\logic\security2.cxx:4133) Error code 0XC007219D (8605): The requested object has a non-unique identifier and cannot be retrieved.[7/10/2009 9:36:35 AM] [2] CAtomOrgLevelCt::ScAddDSObjects (f:\08.01.0240\sources\dev\admin\src\udog\exsetdata\components\server\a_orglevelct.cxx:379) Error code 0XC007219D (8605): The requested object has a non-unique identifier and cannot be retrieved.[7/10/2009 9:36:35 AM] [2] Leaving CAtomOrgLevelCt::ScAddDSObjects[7/10/2009 9:36:35 AM] [2] CBaseAtom::ScRefreshDSObjects (f:\08.01.0240\sources\dev\admin\src\udog\setupbase\basecomp\baseatom.cxx:1476) Error code 0XC007219D (8605): The requested object has a non-unique identifier and cannot be retrieved.[7/10/2009 9:36:35 AM] [2] CAtomOrgLevelCt::ScReinstall (f:\08.01.0240\sources\dev\admin\src\udog\exsetdata\components\server\a_orglevelct.cxx:169) Error code 0XC007219D (8605): The requested object has a non-unique identifier and cannot be retrieved.[7/10/2009 9:36:35 AM] [2] Leaving CAtomOrgLevelCt::ScReinstall[7/10/2009 9:36:35 AM] [2] mode = 'Reinstall' (61955) CBaseAtom::ScSetup (f:\08.01.0240\sources\dev\admin\src\udog\setupbase\basecomp\baseatom.cxx:535) Error code 0XC007219D (8605): The requested object has a non-unique identifier and cannot be retrieved.[7/10/2009 9:36:35 AM] [2] ScSetupAtom (f:\08.01.0240\sources\dev\admin\src\udog\exsetdata\exsetds.cxx:897) Error code 0XC007219D (8605): The requested object has a non-unique identifier and cannot be retrieved.[7/10/2009 9:36:35 AM] [2] Leaving ScSetupAtom[7/10/2009 9:36:35 AM] [2] [ERROR] An error occurred. The error code was 3221692829. The message was The requested object has a non-unique identifier and cannot be retrieved..[7/10/2009 9:36:35 AM] [1] The following 1 error(s) occurred during task execution:[7/10/2009 9:36:35 AM] [1] 0. ErrorRecord: An error occurred. The error code was 3221692829. The message was The requested object has a non-unique identifier and cannot be retrieved..[7/10/2009 9:36:35 AM] [1] 0. ErrorRecord: Microsoft.Exchange.Management.Deployment.ExsetdataException: An error occurred. The error code was 3221692829. The message was The requested object has a non-unique identifier and cannot be retrieved..[7/10/2009 9:36:35 AM] [1] [ERROR] An error occurred. The error code was 3221692829. The message was The requested object has a non-unique identifier and cannot be retrieved..[7/10/2009 9:36:35 AM] [1] Setup is halting task execution because of one or more errors in a critical task.[7/10/2009 9:36:35 AM] [1] Finished executing component tasks.[7/10/2009 9:36:35 AM] [1] Ending processing.[7/10/2009 9:36:35 AM] [0] The Exchange Server Setup operation did not complete. For more information, visit http://support.microsoft.com and enter the Error ID.[7/10/2009 9:36:35 AM] [0] End of Setup[7/10/2009 9:36:35 AM] [0] **********************************************We do have a Ex2003 server in production in this domain...

What are you running for Domain Controllers? Is this Exchange 07 RTM or SP1?How complex is your domain?Do you have multiple sites in AD Sites and Services?SF - MCITP:EMA, MCTS

Exchange 2k7 SP1 DC's are all Exch2003 SP1, and the 2008 server we are installing Exchange on is a DC alsoFairly simple domain structure, but there are 3 sites defined in sites and services, but all are reachable..

by Exchange 2003 SP1 I will assume that you mean Windows 2003 SP1.What level is the domain/forest functional level? Are there DCs in the same site as Exchange?Does your environment meet the requirements? Exchange 2007 System Requirementshttp://technet.microsoft.com/en-us/library/aa996719.aspxCan you install Exchange on a computer other then a DC?SF - MCITP:EMA, MCTS

The requested object has a non-unique identifier and cannot be retrieved indicates that we might have a duplicate SID in the environment Please follow KB 816099 to locate and remove the duplicated SID Please run the command below on each DC and check the test results, especially the test for RID Manager Dcdiag /v c:\Dcdiag.txt Please use the Verify that Active Directory objects that are related to RID allocation are valid section in KB 839879 on the DCs Is there any related error event in the application on any servers? Resources: Description of RID Attributes in Active Directory