Attempting to ping RPC endpoint 6001 (Exchange Information Store) on server The attempt to ping the endpoint failed.

Hi Experts,
Im trying to move my on-premises exchange 2003 on windows server 2003 SP3 to the cloud with Exchange Online on Office 365, and Im trying to Test my connection RPC over HTTP and I get this error.

Attempting to ping RPC endpoint 6001 (Exchange Information Store) on server mail.mydomain.com.
       The attempt to ping the endpoint failed.
        
      Additional Details
       The RPC_S_SERVER_UNAVAILABLE error (0x6ba) was thrown by the RPC Runtime process.

I double check the registry entries, also I check with netstat that my server is listening on port 6001 but I still got the issue.
I've been looking for an answer on this for a couple of days without luck
My environment is, Exchange server 2003 running mirrored with Neverfail, I have an ISA Server 2006

I will appreciate your help
miguelitxAsked:
Who is Participating?
 
footechConnect With a Mentor Commented:
Use the external name for the RPC proxy field, but use the internal name for the Exchange server field.
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StuWhitbyCommented:
Firstly, check

  rpcinfo -p mail.mydomain.com

to ensure that the rpc services are running correctly and listing the endpoints you want to reach.  The default portmapper entry is port 111 - may show up as sunrpc.  This will need to be available through the firewall etc, though I'd expect it's generally passed through okay.  

If that gives you nothing, get hold of wireshark from www.wireshark.org, install it on your client, and set up a capture filter of "host=mail.mydomain.com", then try your ping again, stop the capture, and look at the output.  This should show you fairly quickly where the problem is.  If you can't interpret the output, save it as a .pcap file, post it here and I'll take a quick look.
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footechCommented:
I'm assuming you're using www.testexchangeconnectivity.com.  Did you choose to manually specify the server settings, and enter the internal FQDN of your mailbox server (the backend server if you're using a FE/BE configuration) for the "Exchange server" field?
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miguelitxAuthor Commented:
Yes, im using www.testexchangeconnectivity.com 
And no, im using external domain name
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footechCommented:
I don't know what further information I could give you that would merit a better grade.  It's as simple as following the instructions at their site.
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llovingCommented:
I followed this thread and must agree with footech. Exact answer to my situation which I believe is the same as the original post.
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