Problem with OMA

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I have recently installed an Exchange 2003 server on a win2k server in my
win2k AD for the purpose of testing Active sync with mobile devices.

I have read the step by step guides to deploying and countless other
articles, but I don't understand whereI could have gone wrong.

when I browse to http://localhost/OMA I recieve the common error:

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

However the Event that coincides directly with this error is as follows:

Event Type: Error
Event Source: MSExchangeOMA
Event Category: (1000)
Event ID: 1503
Date: 8/26/2005
Time: 10:06:18 AM
User: N/A
Computer: NS2
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.FindUserViaCreds(NetworkCredential creds, WindowsIdentity identity)
at Microsoft.Exchange.OMA.Preferencing.OmaUserInfo.ClearCache()
at
Microsoft.Exchange.OMA.Preferencing.OmaUserInfo..ctor(NetworkCredential
creds, WindowsIdentity identity)
at
Microsoft.Exchange.OMA.Preferencing.OmaUserInfo..ctor(NetworkCredential creds)

Message: Exception has been thrown by the target of an invocation.
Source: mscorlib
Stack trace:
at System.Reflection.RuntimeConstructorInfo.InternalInvoke(BindingFlags
invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean
isBinderDefault)
at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags
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.Session_Start(Object
sender, EventArgs e)

Message: Exception of type
Microsoft.Exchange.OMA.DataProviderInterface.ProviderException 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.Session_Start(Object
sender, EventArgs e)
at System.Web.SessionState.SessionStateModule.RaiseOnStart(EventArgs e)
at System.Web.SessionState.SessionStateModule.CompleteAcquireState()
at System.Web.SessionState.SessionStateModule.BeginAcquireState(Object
source, EventArgs e, AsyncCallback cb, Object extraData)
at
System.Web.AsyncEventExecutionStep.System.Web.HttpApplication+IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&
completedSynchronously)


For more information see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.

Personally I have not found any information for this specific error.
I have applied workarounds and fixes from other similar events to no avail.

Does anyone have any Idea what I might have done wrong or what is going on?

.

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