There are several articles and posts on this topic, you can take a look:
How to troubleshoot DCOM 10009 error logged in system event?
DCOM 10009 SBS2003
DCOM Event ID 10009:
http://support.microsoft.com/kb/957713
Sean Zhu
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Sean Zhu
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Sean
I can confirm what others here are saying (RE: DistributedCOM 10009 Error)
Point 1. No fragments in the AD for the old sbs 2003 server (so the suggestions you have posted are of no help)
Point 2. this is indeed related to BPA. (but its not new) to me at least (I have had the errors since mgrating sbs2003 to sbs 2008R2 6 months ago)
Point 3, the errors occur approx 2.00am to 2.10am in the morning
Point 4 they are related to BPA as running manually "DOES" recreate the errors.
So we have some precise repeateable info here.
How are you guys going on a solution.
Regards Peter
Frustrated IT Man.