SBS 2011 with DCOM 10009 citing source server after recent updates

Hi,

To troubleshoot the issue, I think you can capture network trace when the event occurs. Check the packets it around that time the event occurs. Here is the network monitor 3.4 tool:

http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=983b941d-06cb-4658-b7f6-3088333d062f

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Best Regards

Scott Xie