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A Web exception occurred because an HTTP 404 - NotFound response was received from Unknown.

    Question

  • Outlook anywhere not working , all testing ok except below:

    Attempting to ping RPC proxy mail.abc.com.
    RPC Proxy can't be pinged.
    Additional Details
    A Web exception occurred because an HTTP 404 - NotFound response was received from Unknown.
    Headers received:
    request-id: 35d8bc5e-0a93-444c-a25f-ad0e991fd5b8
    X-CasErrorCode: EndpointNotFound
    Persistent-Auth: true
    X-FEServer: E2013HT
    Content-Length: 0
    Cache-Control: private
    Date: Fri, 12 Jul 2013 12:34:26 GMT
    Server: Microsoft-IIS/8.0
    X-AspNet-Version: 4.0.30319
    X-Powered-By: ASP.NET

    Friday, July 12, 2013 12:48 PM

Answers

All replies

  • Hi Bhupen,

    It seems that port 443 is blocked. Also run test exchange connectivity test and check the result.


    Regards, Sunny Kewalramani.

    Friday, July 12, 2013 7:28 PM
  • Hi

    The issue may be related to IIS component. Please try to run IISReset to test the issue

    You can try to disable Outlook Anyhwhere and remove the “RPC Over HTTPS Proxy” component, then reinstall the component and also enable Outlook Anywhere.


    Kent Huang
    TechNet Community Support

    Wednesday, July 17, 2013 7:19 AM
  • Please use https://www.testexchangeconnectivity.com to test the OA  and paste the failed results here.

    Milind Naphade | MCTS:M (Exchange 2007 and 2010) | http://www.msexchangegeek.com RSS Feed

    Wednesday, July 17, 2013 8:14 AM
  • Hi,

    We are also  facing the same issue 

    Please find the Testconnectivity results.

    Testing RPC/HTTP connectivity.
      The RPC/HTTP test failed.
     
    Additional Details
      Elapsed Time: 6435 ms.
     
    Test Steps
     
    Attempting to resolve the host name mail.domain.com in DNS.
      The host name resolved successfully.
     
    Additional Details
    Testing TCP port 443 on host mail.domain.com to ensure it's listening and open.
      The port was opened successfully.
     
    Additional Details
    Testing the SSL certificate to make sure it's valid.
      The certificate passed all validation requirements.
     
    Additional Details
     
    Test Steps
    Checking the IIS configuration for client certificate authentication.
      Client certificate authentication wasn't detected.
     
    Additional Details
    Testing HTTP Authentication Methods for URL https://mail.domain.com/rpc/rpcproxy.dll?mail.cwm.ae:6002.
      The HTTP authentication methods are correct.
     
    Additional Details
     
    The Microsoft Connectivity Analyzer found all expected authentication methods and no disallowed methods. Methods found: Basic, Negotiate, NTLM
    Elapsed Time: 873 ms.
    Testing SSL mutual authentication with the RPC proxy server.
      Mutual authentication was verified successfully.
     
    Additional Details
     
    Certificate common name mail.domain.com matches msstd:mail.domain.com
    Elapsed Time: 0 ms.
    Attempting to ping RPC proxy mail.domain.com
      RPC Proxy can't be pinged.
     
    Additional Details
     
    A Web exception occurred because an HTTP 404 - NotFound response was received from Unknown.
    Headers received:
    request-id: 2f527d17-ee51-4456-aafd-4ff72d641ca5
    X-CasErrorCode: EndpointNotFound
    Persistent-Auth: true
    X-FEServer: CAS2
    Content-Length: 0
    Cache-Control: private
    Date: Tue, 03 Dec 2013 07:29:34 GMT
    Server: Microsoft-IIS/8.0
    X-AspNet-Version: 4.0.30319
    X-Powered-By: ASP.NET

    Elapsed Time: 1473 ms

    I even checked the following article still the issue persists 

    http://infused.co.nz/2013/05/13/exchange-2013-outlook-anywhere-rpc-settings/ 

    Appreciate your help.

    Ashok


    • Edited by AshokVikram Tuesday, December 03, 2013 8:16 AM
    Tuesday, December 03, 2013 8:13 AM
  • HI ashok

    Please restart both the CAS server and also disable outlook anywhere - remove rpc proxy component and then reboot and re enable

    Regards

    Acacio Fernandes

    Wednesday, December 04, 2013 9:33 AM
  • Were you ever able to get this resolved?  I've tried everything I can find and still no luck...
    Wednesday, January 22, 2014 6:23 AM