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I am getting a lot of Event ID 2159 warnings on my Exchange 2010 server. When I navigate to the specified location in ADSI Edit, I don't see anything strange. The path is:

CN=Interop RGC,CN=Connections,CN=Exchange Routing Group (DWBGZMFD01QNBJR),CN=Routing Groups,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=First Organization,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=domainname,DC=com 

The only orphaned server references I was able to find were in the path below, and there are only three CN=SMTP objects there, all of them pointing to the orphaned server. So is it safe to delete them?

CN=Connections,CN=First Organization,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=domainname,DC=com

Here are the details of the event ID 2159 warning:

Process edgetransport.exe () (PID=5212). Configuration object CN=Interop RGC,CN=Connections,CN=Exchange Routing Group (DWBGZMFD01QNBJR),CN=Routing Groups,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=First Organization,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=domainname,DC=com read from dc1.domainname.com failed validation and will be excluded from the result set. Set event logging level for Validation category to Expert to get additional events about each failure.

  • We don't all have every single Event ID in existence memorized so how about posting the details of that Event ID, like the Source, details, etc.? – joeqwerty Mar 2 '16 at 17:28
  • What does get-routinggroupconnector return? – Sembee Mar 2 '16 at 17:37
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The solution turned out to be just removing all routing group connectors which were still there from an Exchange 2003 server which was decommissioned years ago. The command I used:

Get-RoutingGroupConnector | Remove-RoutingGroupConnector
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