Log Name: Application Source: System.ServiceModel 3.0.0.0 Date: 2011/05/17 10:47:01 AM Event ID: 3 Task Category: WebHost Level: Error Keywords: Classic User: SYSTEM Computer: HOEXC02.amatolawater.co.za Description: WebHost failed to process a request. Sender Information: System.ServiceModel.ServiceHostingEnvironment+HostingManager/32001227 Exception: System.ServiceModel.ServiceActivationException: The service '/Autodiscover/Autodiscover.xml' cannot be activated due to an exception during compilation. The exception message is: This collection already contains an address with scheme http. There can be at most one address per scheme in this collection. Parameter name: item. ---> System.ArgumentException: This collection already contains an address with scheme http. There can be at most one address per scheme in this collection. Parameter name: item at System.ServiceModel.UriSchemeKeyedCollection.InsertItem(Int32 index, Uri item) at System.Collections.Generic.SynchronizedCollection`1.Add(T item) at System.ServiceModel.UriSchemeKeyedCollection..ctor(Uri[] addresses) at System.ServiceModel.ServiceHost..ctor(Type serviceType, Uri[] baseAddresses) at System.ServiceModel.Activation.ServiceHostFactory.CreateServiceHost(Type serviceType, Uri[] baseAddresses) at System.ServiceModel.Activation.ServiceHostFactory.CreateServiceHost(String constructorString, Uri[] baseAddresses) at System.ServiceModel.ServiceHostingEnvironment.HostingManager.CreateService(String normalizedVirtualPath) at System.ServiceModel.ServiceHostingEnvironment.HostingManager.ActivateService(String normalizedVirtualPath) at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath) --- End of inner exception stack trace --- at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath) at System.ServiceModel.ServiceHostingEnvironment.EnsureServiceAvailableFast(String relativeVirtualPath) Process Name: w3wp Process ID: 10328 Event Xml: <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> <System> <Provider Name="System.ServiceModel 3.0.0.0" /> <EventID Qualifiers="49154">3</EventID> <Level>2</Level> <Task>5</Task> <Keywords>0x80000000000000</Keywords> <TimeCreated SystemTime="2011-05-17T08:47:01.000000000Z" /> <EventRecordID>126506</EventRecordID> <Channel>Application</Channel> <Computer>HOEXC02.amatolawater.co.za</Computer> <Security UserID="S-1-5-18" /> </System> <EventData> <Data>System.ServiceModel.ServiceHostingEnvironment+HostingManager/32001227</Data> <Data>System.ServiceModel.ServiceActivationException: The service '/Autodiscover/Autodiscover.xml' cannot be activated due to an exception during compilation. The exception message is: This collection already contains an address with scheme http. There can be at most one address per scheme in this collection. Parameter name: item. ---&gt; System.ArgumentException: This collection already contains an address with scheme http. There can be at most one address per scheme in this collection. Parameter name: item at System.ServiceModel.UriSchemeKeyedCollection.InsertItem(Int32 index, Uri item) at System.Collections.Generic.SynchronizedCollection`1.Add(T item) at System.ServiceModel.UriSchemeKeyedCollection..ctor(Uri[] addresses) at System.ServiceModel.ServiceHost..ctor(Type serviceType, Uri[] baseAddresses) at System.ServiceModel.Activation.ServiceHostFactory.CreateServiceHost(Type serviceType, Uri[] baseAddresses) at System.ServiceModel.Activation.ServiceHostFactory.CreateServiceHost(String constructorString, Uri[] baseAddresses) at System.ServiceModel.ServiceHostingEnvironment.HostingManager.CreateService(String normalizedVirtualPath) at System.ServiceModel.ServiceHostingEnvironment.HostingManager.ActivateService(String normalizedVirtualPath) at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath) --- End of inner exception stack trace --- at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath) at System.ServiceModel.ServiceHostingEnvironment.EnsureServiceAvailableFast(String relativeVirtualPath)</Data> <Data>w3wp</Data> <Data>10328</Data> </EventData> </Event>

Hi, This might help: http://social.technet.microsoft.com/Forums/en-US/exchange2010/thread/694ecc35-ed78-4f0f-b9d6-2fe9546e11e7 Leif

Hello, I would like to ask whether the Out of Office (OOF) assistant works via OWA? If the OOF works in OWA, the issue might be caused by the autodiscover or availability service. Thanks, Simon