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Help with RPC over HTTPS

Posted on 2008-10-29
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Last Modified: 2012-05-05
I am trying to get HTTP over RPC to work for my Exchange server.

I added a new server that I connected to the Exchange organization.  I then moved all the mailboxes and public folders.  I changed the bridgehead and recipient updating service.  Everything seems to be working properly.  I took the server down for a little bit and there were no errors or problems with mail.

There was some garbage in IIS so I uninstalled it and reinstalled it to get it back to default settings.  i enabled the RPC component on the front end server.  i went into Exchange System manager and set the server as the front end server.  I then set it as the front end in the RPC settings in ESM.

I then set the back end server in ESM in the PRC area.

I left the ports set to the default.  They correspond between the 2 servers.  I have verified that the PRC ports are open on the firewall, along with http and https.

However, I can not connect.  I am pretty new at this so I am not sure of the exact steps.  I have followed what I have found online and in books, but I am sure I am missing something.

Any ideas on how to troubleshoot this?
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Question by:ryan80
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by:ryan80
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By the way, I am unable to connect through RPC, and the error that I get is:

The connection to the Exchange Server is unavailable.
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by:ryan80
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Thanks for the link. I am looking into that now.  

Let me ask a question.  With the sever set up as the RPC server and the frontend, will it still server OWA? Right now it is not working with OWA and I am wondering if that is indicative of an issue.

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by:epohl
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Yes OWA will work as well. If OWA is also not working I would say yes that indicates a problem. Are you able to access OWA on that server inside the network?
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by:ryan80
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No, i cant access OWA inside the network on the RPC server.  I can access it on the backend server though.

I think ill uninnstall Exchange and then reinstall it.  There is nothing residing on the server, so there shouldnt be an issue.
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by:epohl
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Let me know if this works for you.
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by:ryan80
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OK so I reinstalled Exchange and OWA now works.  However I am still having issues with RPC.  i can not seem to establish a connection.  I am going through all the troubleshooting steps that are listed in that technet article.

for the ValidPorts value i have the following I have the 6001-6002 and 6004 ports that are associated with the backend server (ex. servername,6004) as entries.

The only thing that looks like it may be wrong is that when i do a rpcdump, I dont see a port etry of 6004.  Also when i try to specify the ncacn_http protocol i get an error the permision was denied. I am not sure if this is wrong or not.  

Any ideas?
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by:ryan80
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Some additional testing.  I am able to telnet on ports 6001,6002, and 6004 from the frontend server to the backend server.  

I can telnet of port 6001 and 6002 on from the backend server to the frontend server, but not on port 6004. How do I open this up?
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by:ryan80
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Thank you for your help.  After going through all the trouble shooting steps I was able to get it working.  I hope next time I dont have as many problems, but I really got a good understanding of how to trouble shoot RPC.
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