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  • MS Exchange Server no response

    Hi,

    I have Windows 2003 server running Exchange 2003 SP2. For the past 1 week, my users cannot connect to the exchange server every morning between 8 -9 am. I have checked on the server but found out no errors on the Exchange Server. Under Eventviewer, found out these event errors such as 8026 / 8250 / 2104 / 2102. I have applied all latest MS updates & checked that all related services are running. My daily backup starts at 10pm at night & shouldn't affect the connection. The connection is okay when I restart my server.

    Kindly assist. Thanks.

  • #2
    Re: MS Exchange Server no response

    Are users getting any sort of error message?
    Can they connect via OWA?
    Have you check task manager during these times to see what processes are running and if any of them are taking up exceptional amounts of CPU?

    Michael
    Michael Armstrong
    www.m80arm.co.uk
    MCITP: EA, MCTS, MCSE 2003, MCSA 2003: Messaging, CCA, VCP 3.5, 4, 5, VCAP5-DCD, VCAP5-DCA, ITIL, MCP, PGP Certified Technician

    ** Remember to give credit where credit is due and leave reputation points sigpic where appropriate **

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    • #3
      Re: MS Exchange Server no response

      Hi,

      Users did not get any error message - just cannot connect to Outlook. They can still connect to OWA. Did not check on the task manager. Will try to check if it happens again. What could be the cause of it? Please advise. Thanks.

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      • #4
        Re: MS Exchange Server no response

        Error codes on their own are close to useless.
        What else is happening on the server at that time? Backups overrunning, maintenance tasks etc? You haven't got AV set to do an automated scan at that time?

        It is going to be difficult without further diagnosis.
        Where strange connections issues are coming up I am suggest a review of this article on the MS Exchange Team blog about a feature in Windows 2003 SP2.
        http://msexchangeteam.com/archive/20...18/446400.aspx

        Simon.
        --
        Simon Butler
        Exchange MVP

        Blog: http://blog.sembee.co.uk/
        More Exchange Content: http://exchange.sembee.info/
        Exchange Resources List: http://exbpa.com/
        In the UK? Hire me: http://www.sembee.co.uk/

        Sembee is a registered trademark, used here with permission.

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        • #5
          Re: MS Exchange Server no response

          Outlook clients use MAPI/RPC by default to connect to an Exchange server. If you can connect via OWA then it sounds like Exchange is OK but maybe you have an RPC problem. I might suggest turning on logging on one of your Outlook clients to see if the Outlook log shows anything helpful.

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          • #6
            Re: MS Exchange Server no response

            Hi

            I was not at the client side everytime the connection hangs. Will try to gain access if possible. However, it seems to work fine now w/o hanging. I created a new SMTP connector & it seems that it is working now. Could it be the reason?

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            • #7
              Re: MS Exchange Server no response

              Hi guys,

              I have checked the taskmamanger from the server : during the point that the connection hangs, these 2 processes took the most memory - store.exe around 600MB, SMEX_System around 200MB..


              AFter I restart the exchange store services, the connection resumes....

              Any solution on this? Pls help. Thanks.

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              • #8
                Re: MS Exchange Server no response

                The memory usage by the store.exe process is not high at 600MB. Outlook clients do not use SMTP to communicate with Exchange in native mode, they use MAPI/RPC so creating a new SMTP connector is not addressing the root cause of your problem. It looks like you are using TrendMicro Scanmail, so I would say you should look at the configuration of Scanmail and make sure it is correct. The next time the problem occurrs you should stop the Scanmail service(s) and see if the problem goes away.

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                • #9
                  Re: MS Exchange Server no response

                  Hi,

                  Ok. I shall look at the Trend Micro config again. Thanks.

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