Exchange 2003 to 2010, unreachable destination

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    chuk29
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    #155652

    I am having an issue with maiflow from exchange 2003 to exchange 2010.
    My actual situation is:
    Exchange 2003
    – 3 mailbox servers
    – 1 front end server
    Exchange 2010
    – 2 Mailbox
    – 2 Hub servers
    – 1 Cas server
    the configuration is:
    From one server 2003 and one HUB 2010 server:
    – New-RoutingGroupConnector -Name “Interop RGC” -SourceTransportServers “p-hv-exchub1.mydomain.com” -TargetTransportServers “p-hv-hcex2003.mydomain.com” -Cost 10 -Bidirectional $true -PublicFolderReferralsEnabled $true
    on the exchange 2010 HUB server I have the Internet send connector
    – SMTP:*;25 to the TrendMicro spam filter.
    – The TrendMicros pointer sends to the exchange 2010 hub server.
    – The receive connector on the 2010 hub server allow anonymous users.
    – I already update the Regsvr32 -u xlsasink.dll
    – Also: HKLMSYSTEMCurrentControlSetServicesRESvcParameters : “SuppressStateChanges”=dword:00000001

    The issue is:
    From 2003 to Internet (Gmail) : works and goes through the “Interop RGC”
    From 2010 to Internet (Gmail) : works
    From Internet (Gmail) to 2003 : works and goes through the “Interop RGC”
    From Internet (Gmail) to 2010 : works
    From 2010 to 2003


    : works
    BUT
    From 2003 to 2010


    : Fail
    – The message remain into the unreachable destination
    – in the tracking the message last line is
    SMTP: Message routed an dqueued for remote delivery
    I have tried everything I know, rebooting the servers, install another exchange 2003. The problem seems to be in AD but i don
    t kwow where.
    Any help.
    Chuk

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