I am trying to add an Exchange 2007 server to be a front-end only to an existing Exchange 2003 environment, however during setup I encounter an error during the install phase of Organizational Prerequisities. "error code was 2147947410 message was The object already exists.." How do I get past this error to get the install to run?

Can you look in the ExchangeSetup.log file and copy/paste the error, and a few lines above and below the error, into a reply post? I'd like to see what object its complaining about. Thanks!

There is nothing in the log file after this. [12:00:55] Creating organization address books[12:00:55] Entering CAtomOrgCtChildren::ScCreateOrgLevelAddressBooksCTAndObjs[12:00:55] Entering CDirectoryManager::ScDeleteDSObject[12:00:55] Leaving CDirectoryManager::ScDeleteDSObject[12:00:55] Leaving CAtomOrgCtChildren::ScCreateOrgLevelAddressBooksCTAndObjs[12:00:55] Renaming the Address List Container created by the ADC.[12:00:55] Entering CAtomOrgCtChildren::ScMoveADCAddressListContainerUnderneathOrg[12:00:55] Leaving CAtomOrgCtChildren::ScMoveADCAddressListContainerUnderneathOrg[12:00:55] Creating organization address lists[12:00:55] Entering CAtomOrgCtChildren::ScCreateOrgLevelAddressListObjs[12:00:55] Entering CAtomOrgCtChildren::ScCreateGlobalAddressListObj[12:00:55] CAtomOrgCtChildren::ScCreateGlobalAddressListObj (f:\08.00.0605\sources\dev\admin\src\udog\exsetdata\components\server\a_orgctchildren.cxx:1782) Error code 0X80071392 (5010): The object already exists.[12:00:55] Leaving CAtomOrgCtChildren::ScCreateGlobalAddressListObj[12:00:55] CAtomOrgCtChildren::ScCreateOrgLevelAddressListObjs (f:\08.00.0605\sources\dev\admin\src\udog\exsetdata\components\server\a_orgctchildren.cxx:1301) Error code 0X80071392 (5010): The object already exists.[12:00:55] Leaving CAtomOrgCtChildren::ScCreateOrgLevelAddressListObjs[12:00:55] CAtomOrgCtChildren::ScAddDSObjects (f:\08.00.0605\sources\dev\admin\src\udog\exsetdata\components\server\a_orgctchildren.cxx:192) Error code 0X80071392 (5010): The object already exists.[12:00:55] Leaving CAtomOrgCtChildren::ScAddDSObjects[12:00:55] CBaseAtom::ScRefreshDSObjects (f:\08.00.0605\sources\dev\admin\src\udog\setupbase\basecomp\baseatom.cxx:1532) Error code 0X80071392 (5010): The object already exists.[12:00:55] CBaseAtom::ScReinstall (f:\08.00.0605\sources\dev\admin\src\udog\setupbase\basecomp\baseatom.cxx:862) Error code 0X80071392 (5010): The object already exists.[12:00:55] Leaving CBaseAtom(Microsoft Exchange Organization-Level Container Children)::ScReinstall[12:00:55] Service = '' CBaseServiceAtom::ScReinstall (f:\08.00.0605\sources\dev\admin\src\udog\setupbase\basecomp\basesvcatom.cxx:240) Error code 0X80071392 (5010): The object already exists.[12:00:55] Leaving CBaseServiceAtom(Microsoft Exchange Organization-Level Container Children)::ScReinstall[12:00:55] mode = 'Reinstall' (61955) CBaseAtom::ScSetup (f:\08.00.0605\sources\dev\admin\src\udog\setupbase\basecomp\baseatom.cxx:537) Error code 0X80071392 (5010): The object already exists.[12:00:55] ScSetupAtom (f:\08.00.0605\sources\dev\admin\src\udog\exsetdata\exsetds.cxx:1032) Error code 0X80071392 (5010): The object already exists.[12:00:55] Leaving ScSetupAtom

The problem is permissions into a object. check this link its worked for me. http://support.microsoft.com/kb/286296

I also experienced this problem or one very similar to it. It was not permissions related in my case. I found the solution at: http://support.microsoft.com/kb/936907/en-us