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Exchange 2013 Outlook Anywhere Issues

Posted on 2014-07-28
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Last Modified: 2014-08-06
I have two Exchange servers in a coexistence environment.

1 x Exchange 2013 SP1 server with MB and CAS functionality.
1 x Exchange 2010 SP3 server with MB, HT, and CAS functionality.

I have successfully migrated my mail flow and CAS protocol functionality to the new 2013 server.  In performing the various tests on testconnectivity.microsoft.com, I have encountered the following error performing the Outlook Anywhere test, using autodiscover.  The test results are the same for mailboxes located on both the 2010 and 2013 servers.
Exchange-Connectivity-RPC-Failure.PNG
http://technet.microsoft.com/en-us/library/db543644-c252-47ee-a70b-4f60770083dc.aspx
Upon doing some research at the URL provided by the test results, here are my conclusions.

1. The frontend proxy can successfully resolve the hostname and NetBIOS name of both mailbox servers. On the 2013 server, the mailbox server and frontend are on the same server.
2.  The value for my "ValidPorts" registry key is "SERVERNAME:593;SERVERNAME:49152-65535"
3.  Here are my telnet results from the frontend proxy to the mailbox server (same server) with firewall disabled.
     6001 = responds with "ncacn_http/1.0" message
     6002 = no response
     6003 = no response
     6004 = no response
     6005 = responds with no message
     6006 = response with no message
     6007 = responds with no message
     6008 = no response
     6009 = no response
     6010 = no response
4.  I'm not running Exchange 2007

I've tried a few suggestions such as creating a hostfile, adding values for the FQDN and NetBIOS names for the 6000-range ports in the ValidPorts key, and experimenting with Basic authentication.  Nothing seems to help.  I do not get this error when I manually specify the server settings - only when I attempt to use autodiscover.  My autodiscover record resolves perfectly, and RPC is the only CAS feature I'm having problems with.  Any ideas?
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Question by:marrj
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marrj earned 0 total points
ID: 40243933
I talked to Microsoft about this.  They were very opposed to the idea of using testexchangeconnectivity.com to test Outlook connectivity.  That's pretty funny, given that it is their product.  They said that as long as Outlook was working externally, the 6001 error was nothing to worry about.
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by:marrj
ID: 40243955
I did the research myself.
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