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DCOM got error "2147944122" from the computer [IP] when attempting to activate server: {SID}

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Last Modified: 2019-01-03
Receiving error in event viewer:
    DCOM got error "2147944122" from the computer [IP] when attempting to activate server: {SID}
    EventID 1006
    Each domain controller is receiving 100 per day (probably more)

Our environment:
- 3x 2008 R2domain controllers running at 2008 level

We have recently:
- Added a 2016 domain controller (we just start on journey to upgrade to 2016) which has been promo'd and DNS configured/no DHCP yet
- Turned on scavenging in DNS (discovered it was never set - had records over 10 years old)

Error shows up on all four domain controllers (new and old).  Everything seem so be working and am unsure when the error started on the servers.

All help gratefully received as scratching head.
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Simple Geek from the '70s
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This one is on us!
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