Error removing Exchange from SBS 2003 before demoting

xav1963
xav1963 used Ask the Experts™
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With exception of a couple of small things, migration from sbs 2003 to sbs 2011 has been good. I am at last stage where I need to remove Exchange 2003 from SBS 2003 before its demotion. The following error occurs when I select to uninstall the Exchange component -"Setup encountered an error while checking prerequisites for the component "Microsoft Exchange". 0x80072030 (8240): There is no such object on the server."

The error log shows this -
The operation has completed successfully.
[17:42:01] Setup encountered an error while checking prerequisites for the component "Microsoft Exchange":
0X80072030 (8240): There is no such object on the server.
[17:42:30] Entering CCompForestPrep::ScGetEffectiveMode
[17:42:30] Leaving CCompForestPrep::ScGetEffectiveMode
[17:42:30] Entering ScDetermineIfLocalDomainServerGroupHasAlreadyBeenACLedOnExchangeCT
[17:42:30] Using cached result for domain "/dc=local/dc=xxxxxxx"
[17:42:30] The required permissions have already been set
[17:42:30] Leaving ScDetermineIfLocalDomainServerGroupHasAlreadyBeenACLedOnExchangeCT
[17:42:30] Entering CCompDomainPrep::ScGetEffectiveMode
[17:42:30] Leaving CCompDomainPrep::ScGetEffectiveMode
[17:42:30] Entering ScDetermineIfLocalDomainServerGroupHasAlreadyBeenACLedOnExchangeCT
[17:42:30] Using cached result for domain "/dc=local/dc=xxxxxx"
[17:42:30] The required permissions have already been set
[17:42:30] Leaving ScDetermineIfLocalDomainServerGroupHasAlreadyBeenACLedOnExchangeCT
[17:42:30] Attempting to create the SRS DOB [checking whether SRS is installed].
[17:42:30] Entering ScPRQ_DoesNotContainLastMAPIMDBInMixedModeAG
[17:42:30] This prerequisite has PASSED -- ID:62235 --
[17:42:30] Leaving ScPRQ_DoesNotContainLastMAPIMDBInMixedModeAG
[17:42:30]  ScPRQ_ServerIsNotRUSResponsibleServerInTheNonEmptyOrg (f:\titanium\admin\src\udog\excommon\prereq.cxx:3133)
           Error code 0X80072030 (8240): There is no such object on the server.
[17:42:30]  CCompServer::ScCheckEVSPrerequisites (f:\titanium\admin\src\udog\exsetdata\components\server\compserver.cxx:1358)
           Error code 0X80072030 (8240): There is no such object on the server.
[17:42:30]  CCompServer::ScCheckPrerequisites (f:\titanium\admin\src\udog\exsetdata\components\server\compserver.cxx:955)
           Error code 0X80072030 (8240): There is no such object on the server.
[17:42:30]  CComExchSetupComponent::ScCheckPrerequisites (f:\titanium\admin\src\udog\bo\comboifaces.cxx:1598)
           Error code 0X80072030 (8240): There is no such object on the server.
[17:42:30]  CComExchSetupComponent::ScCheckPrerequisites (f:\titanium\admin\src\udog\bo\comboifaces.cxx:1598)
           Error code 0X80072030 (8240): There is no such object on the server.
[17:42:30] === IGNORING PREVIOUS ERRORS === HrSetProblemOnInstallAction, while calling ScCheckPrerequisites (f:\titanium\admin\src\udog\bo\comboifaces.cxx:1399)
           The operation has completed successfully.
[17:42:30] Setup encountered an error while checking prerequisites for the component "Microsoft Exchange":
0X80072030 (8240): There is no such object on the server.
[17:44:16]  CComBOIFacesFactory::QueryInterface (f:\titanium\admin\src\udog\bo\bofactory.cxx:54)
           Error code 0X80004002 (16386): No interface.

Read up a little and the manual uninstall seems very tedious... This is a small network, 15 users and only about 3 years up and very clean.
My 2 questions are -
1. Help me with this error so I can demote server.
2. What are the consequences if I just went straight to dcpromo?

Thx for any advice....
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Commented:
Hi,

This issue occurs if the following conditions are true:

    You click Remove in the Action list for the Microsoft Exchange top-level component.
    The Exchange Setup program detects existing mailboxes on one or more Exchange Server mailbox stores.

If you want to remove only an Exchange Server component, you must click Change instead of Remove in the Action list for the Microsoft Exchange component.

If you click Remove in the Action list for the Microsoft Exchange component, the Exchange Setup program determines whether any mailboxes exist on the mailbox store.

Note By default, Exchange Server has a Postmaster account. The SMTP address of this account is "postmaster@domain.com." Therefore, even if no user mailboxes remain on the mailbox store, the Postmaster account mailbox may be present.

When you try to remove Exchange Server, the Exchange Setup program determines whether certain prerequisites are met before the Setup program removes Exchange Server. If the Postmaster account mailbox is not present, the Setup program's prerequisite verification is successful.

If the Postmaster account mailbox is present, the prerequisite verification is successful if the following conditions are true:

    The Postmaster account mailbox has a homeMDB attribute that points to the current Exchange server.
    This is the last Exchange server in the organization.

Otherwise, the prerequisite verification is unsuccessful. In this case, the Setup program is unable to remove Exchange Server.

For details follow the below articles

http://support.microsoft.com/kb/283089
http://technet.microsoft.com/en-us/library/bb288905%28EXCHG.80%29.aspx

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Commented:
I was able to recreate the container correctly and then uninstall Exchange.. thx..

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