Error in uninstall Exchange 2003 after Exchange 2010 migration.

Question

Setup encountered an error while checking prerequisites for component "Microsoft Exchange": 0X80072030 (8240): There is no such object on the server.  I searched about the error and most of the hit is referring to postmaster account point
to the old server and that doesn't apply to our environment.
http://support.microsoft.com/kb/283089
below is the errors from the setup log.  Other users had reported this problem but didn't find any solution other than manually uninstall the last Exchange 2003 server.  The problem is I couldn't find any official KB for manually
remove legacy Exchange server from Exchange 2010 org, bb288905 or kb833396 do not provide enough information.  So is my only choice is to call Microsoft Support?
thanks
[22:38:41] Entering ScConstructAddressListServiceDNAndCN
[22:38:41] Leaving ScConstructAddressListServiceDNAndCN
[22:38:41] === IGNORING PREVIOUS ERRORS === ScPRQ_ServerGroupsHaveNotBeenMovedOrRenamed (f:\titanium\admin\src\udog\excommon\prereq.cxx:8080)
           The operation has completed successfully.
[22:38:41] Entering CCompDomainPrep::ScGetEffectiveMode
[22:38:41] Leaving CCompDomainPrep::ScGetEffectiveMode
[22:38:41] Entering ScDetermineIfLocalDomainServerGroupHasAlreadyBeenACLedOnExchangeCT
[22:38:41] Using cached result for domain "/dc=org/dc=cityofwpg/dc=ad"
[22:38:41] The required permissions have already been set
[22:38:41] Leaving ScDetermineIfLocalDomainServerGroupHasAlreadyBeenACLedOnExchangeCT
[22:38:41] Attempting to create the SRS DOB [checking whether SRS is installed].
[22:38:41] Entering ScFindRoutingGroupThatContainsServer
[22:38:41] Leaving ScFindRoutingGroupThatContainsServer
[22:38:41] Entering ScPRQ_DoesNotContainLastMAPIMDBInMixedModeAG
[22:38:41] This prerequisite has PASSED -- ID:62235 --
[22:38:41] Leaving ScPRQ_DoesNotContainLastMAPIMDBInMixedModeAG
[22:38:41]  ScPRQ_ServerIsNotRUSResponsibleServerInTheNonEmptyOrg (f:\titanium\admin\src\udog\excommon\prereq.cxx:3133)
           Error code 0X80072030 (8240): There is no such object on the server.
[22:38:41]  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.
[22:38:41]  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.
[22:38:41]  CComExchSetupComponent::ScCheckPrerequisites (f:\titanium\admin\src\udog\bo\comboifaces.cxx:1598)
           Error code 0X80072030 (8240): There is no such object on the server.
[22:38:41]  CComExchSetupComponent::ScCheckPrerequisites (f:\titanium\admin\src\udog\bo\comboifaces.cxx:1598)
           Error code 0X80072030 (8240): There is no such object on the server.
[22:38:41] === IGNORING PREVIOUS ERRORS === HrSetProblemOnInstallAction, while calling ScCheckPrerequisites (f:\titanium\admin\src\udog\bo\comboifaces.cxx:1399)
           The operation has completed successfully.
[22:38:41] Setup encountered an error while checking prerequisites for the component "Microsoft Exchange":
0X80072030 (8240): There is no such object on the server.
[22:43:09]  CComBOIFacesFactory::QueryInterface (f:\titanium\admin\src\udog\bo\bofactory.cxx:54)
           Error code 0X80004002 (16386): No interface.

Answer 1

Did you also check for other accounts, i.e. non-postmaster?
Setup will check to make sure that there are no mailboxes homed onto this server.    This attribute homeMDB could still be set for a mailbox that has the Exchange attributes remove.  Seen that before when people set attributes directly
via scripts.....
Cheers,
Rhoderick
Microsoft Senior Exchange PFE
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Yes, I did.  Nothing has MDB = the legacy server.    The error from setup log seems to suggest a different problem.