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Exchange 2013 Event Log RPC Error

Posted on 2014-11-12
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Last Modified: 2014-11-12
We're not able to connect any of our Outlook 2013 client to Exchange 2013 sp1.

The event log has a lot of these errors.

Cannot add duplicate collection entry of type 'add' with unique key attribute 'path' set to 'C:\Windows\System32\RpcProxy\RpcProxy.dll

Could this be causing our Outlook clients to not connect to Exchange?
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Question by:BMFC
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by:BMFC
ID: 40437942
uninstalling RPC / reinstalling now
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it_saige earned 500 total points
ID: 40438010
Yes.  Exchange 2013 no longer uses a MAPI over TCP connection.  It exclusively uses an RPC [or MAPI] over HTTP(s) connection.

The original error, though, points to a misconfiguration in one of the config files.  Try running the health check on your server to see if that can assist with determining the misconfigured file.

To run the health check, open a web browser and go to: https://server_fqdn/rpc/healthcheck.htm

https://social.technet.microsoft.com/Forums/exchange/en-US/b3b6a223-292b-45e9-a771-6953b072d2b8/eventid-2001-after-sp1-install?forum=exchangesvrdeploy

-saige-
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