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  • Dreaded OMA Error 1503

    I've followed every KB article I could find and still can't get this working. Exchange 2003 SP2 on WS2003 R2 Enterprise. Error when going to http://myip/oma is:

    A system error has occurred while processing your request. Please try again. If the problem persists, contact your administrator.

    Praying to God that someone can help. I've tried these KB articles:

    http://support.microsoft.com/kb/817379

    http://support.microsoft.com/kb/898131

    Event ID 1503, description:

    An unknown error occurred while processing the current request:
    Message: Object reference not set to an instance of an object.
    Source: Microsoft.Exchange.OMA.Preferencing
    Stack trace:
    at Microsoft.Exchange.OMA.Preferencing.AdUserObject.F indUserViaCreds(NetworkCredential creds, WindowsIdentity identity)
    at Microsoft.Exchange.OMA.Preferencing.OmaUserInfo.Cl earCache()
    at Microsoft.Exchange.OMA.Preferencing.OmaUserInfo..c tor(NetworkCredential creds, WindowsIdentity identity)
    at Microsoft.Exchange.OMA.Preferencing.OmaUserInfo..c tor(NetworkCredential creds)
    Message: Exception has been thrown by the target of an invocation.
    Source: mscorlib
    Stack trace:
    at System.Reflection.RuntimeConstructorInfo.InternalI nvoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean isBinderDefault)
    at System.Reflection.RuntimeConstructorInfo.Invoke(Bi ndingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
    at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
    at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
    at Microsoft.Exchange.OMA.UserInterface.Global.Sessio n_Start(Object sender, EventArgs e)
    Message: Exception of type Microsoft.Exchange.OMA.DataProviderInterface.Provi derException was thrown.
    EventMessage:
    UserMessage: A System error has occurred while processing your request. Please try again. If the problem persists, contact your administrator.
    Source: Microsoft.Exchange.OMA.UserInterface
    Stack trace:
    at Microsoft.Exchange.OMA.UserInterface.Global.Sessio n_Start(Object sender, EventArgs e)
    at System.Web.SessionState.SessionStateModule.RaiseOn Start(EventArgs e)
    at System.Web.SessionState.SessionStateModule.Complet eAcquireState()
    at System.Web.SessionState.SessionStateModule.BeginAc quireState(Object source, EventArgs e, AsyncCallback cb, Object extraData)
    at System.Web.AsyncEventExecutionStep.System.Web.Http Application+IExecutionStep.Execute()
    at System.Web.HttpApplication.ExecuteStep(IExecutionS tep step, Boolean& completedSynchronously)

    For more information, see Help and Support Center at

  • #2
    Re: Dreaded OMA Error 1503

    Some more info.. OMA is enabled in system manager. I am not trying to do SSL. I do have port 80 forwarded to the exchange server. I'm wondering if following the KB articles screwed something up somewhere. No front-end server, just a single exchange server. When I originally started trying to do this I didn't have Exchange SP2 installed. After I realized it wasn't working I thought that might help so I installed it.

    Comment


    • #3
      Re: Dreaded OMA Error 1503

      Reset the virtual directories.
      http://support.microsoft.com/default.aspx?kbid=883380

      Also ensure that you have all post SP2 updates for Exchange 2003 as well.

      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.

      Comment


      • #4
        Re: Dreaded OMA Error 1503

        Originally posted by Sembee View Post
        Reset the virtual directories.
        http://support.microsoft.com/default.aspx?kbid=883380

        Also ensure that you have all post SP2 updates for Exchange 2003 as well.

        Simon.
        Done. I also deleted the virtual directory created from the KB article, exchange-oma. I assumed I should do that?

        I'm still getting the same error. The virtual directories did get recreated, and I did reboot. Here is the description, I'm not sure if it changed or not, still error 1503:

        An unknown error occurred while processing the current request:
        Message: Object reference not set to an instance of an object.
        Source: Microsoft.Exchange.OMA.Preferencing
        Stack trace:
        at Microsoft.Exchange.OMA.Preferencing.AdUserObject.F indUserViaCreds(NetworkCredential creds, WindowsIdentity identity)
        at Microsoft.Exchange.OMA.Preferencing.OmaUserInfo.Cl earCache()
        at Microsoft.Exchange.OMA.Preferencing.OmaUserInfo..c tor(NetworkCredential creds, WindowsIdentity identity)
        at Microsoft.Exchange.OMA.Preferencing.OmaUserInfo..c tor(NetworkCredential creds)
        Message: Exception has been thrown by the target of an invocation.
        Source: mscorlib
        Stack trace:
        at System.Reflection.RuntimeConstructorInfo.InternalI nvoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean isBinderDefault)
        at System.Reflection.RuntimeConstructorInfo.Invoke(Bi ndingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
        at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
        at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
        at Microsoft.Exchange.OMA.UserInterface.Global.Sessio n_Start(Object sender, EventArgs e)
        Message: Exception of type Microsoft.Exchange.OMA.DataProviderInterface.Provi derException was thrown.
        EventMessage:
        UserMessage: A System error has occurred while processing your request. Please try again. If the problem persists, contact your administrator.
        Source: Microsoft.Exchange.OMA.UserInterface
        Stack trace:
        at Microsoft.Exchange.OMA.UserInterface.Global.Sessio n_Start(Object sender, EventArgs e)
        at System.Web.SessionState.SessionStateModule.RaiseOn Start(EventArgs e)
        at System.Web.SessionState.SessionStateModule.Complet eAcquireState()
        at System.Web.SessionState.SessionStateModule.BeginAc quireState(Object source, EventArgs e, AsyncCallback cb, Object extraData)
        at System.Web.AsyncEventExecutionStep.System.Web.Http Application+IExecutionStep.Execute()
        at System.Web.HttpApplication.ExecuteStep(IExecutionS tep step, Boolean& completedSynchronously)

        For more information, see Help and Support Center at

        Comment


        • #5
          Re: Dreaded OMA Error 1503

          Do I need to undo the changes made to the registry from KB article 817379 ?

          Comment


          • #6
            Re: Dreaded OMA Error 1503

            If you haven't undone the registry changes then you will have an invalid configuration. Remove it and then run iisreset to get the change to take effect.

            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.

            Comment


            • #7
              Re: Dreaded OMA Error 1503

              I just tried logging in and used domain/user instead of just user, and it gave me a different error. On the webpage title it says "Server Off-Line" with an error in IE,

              Unable to connect to your mailbox on server EXCHANGE. Please try again later. If the problem persists contact your administrator.


              In event viewer it is Event ID 1805, with details:


              Request from "my username here" resulted in the Microsoft(R) Exchange back-end server "my server here" returning an HTTP error with status code 501
              Response:
              Content-Length: 0
              Server: Microsoft-IIS/6.0
              X-Powered-By: ASP.NET
              Date: Wed, 14 Jan 2009 22:39:03 GMT

              Original Request:
              Content-Type: text/xml
              Depth: 0
              Content-Length: 389
              Expect: 100-continue
              Connection: Keep-Alive
              Host: my exchange server here.
              For more information, see Help and Support Center at

              It shouldn't have anything to do with my router, right? I have port 80 and 443 forwarded to the exchange server. Should I have been logging in with domain/user the whole time? I'm still wondering if I should delete the registry edits made from the KB article.

              Comment


              • #8
                Re: Dreaded OMA Error 1503

                Originally posted by Sembee View Post
                If you haven't undone the registry changes then you will have an invalid configuration. Remove it and then run iisreset to get the change to take effect.

                Simon.
                Will do. I'll post back with results.

                Comment


                • #9
                  Re: Dreaded OMA Error 1503

                  Originally posted by Sembee View Post
                  If you haven't undone the registry changes then you will have an invalid configuration. Remove it and then run iisreset to get the change to take effect.

                  Simon.
                  Works perfectly. Thanks for the help!

                  Comment

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