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jjrab
Asked: 2011-05-25 06:01:28 +0800 CST

Exchange 2010 - attempting to add a mailbox db copy returns a DCOM error in event viewer

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When I attempt to add a mailbox database copy to another mailbox server, it returns "Error: Exception has been thrown by the target of an invocation." The event viewer on the source server logs an event ID 10009, DistributedCOM: DCOM was unable to communicate with the computer [Server] using any of the configured protocols. I've rebooted both mailbox servers, no change. I have 8 other replicated mailbox databases between these two servers that can fail over to each other without issues. Any thoughts?

exchange-2010

2 Answers

  1. Best Answer

    Thanks for your response - it was indeed a firewall issue. I'm using CheckPoint UTM1 security appliances and running VPN between sites. After I re-installed policy, the issue cleared up.

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  2. Are there any local software firewalls running? I would disable them between the two, and try again. If successful, you know the answer.

    https://msmvps.com/blogs/bradley/archive/2009/11/28/dcom-was-unable-to-communicate-with-the-computer.aspx

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