When I try and and delete anything in my mailbox using OWA I get an "An Unexpected Error occured and your requeste couldn't be handled". Upon looking in the event log I find the following: Log Name: Application Source: System.ServiceModel 3.0.0.0 Date: 21/09/2010 18:10:00 Event ID: 3 Task Category: WebHost Level: Error Keywords: Classic User: SYSTEM Computer: exchange2010.nameremoved.co.uk Description: WebHost failed to process a request. Sender Information: System.ServiceModel.ServiceHostingEnvironment+HostingManager/30542218 Exception: System.ServiceModel.ServiceActivationException: The service '/EWS/Exchange.asmx' cannot be activated due to an exception during compilation. The exception message is: A binding instance has already been associated to listen URI 'http://exchange2010.nameremove.co.uk/EWS/Exchange.asmx'. If two endpoints want to share the same ListenUri, they must also share the same binding object instance. The two conflicting endpoints were either specified in AddServiceEndpoint() calls, in a config file, or a combination of AddServiceEndpoint() and config. . ---> System.InvalidOperationException: A binding instance has already been associated to listen URI 'http://exchange2010.nameremove.co.uk/EWS/Exchange.asmx'. If two endpoints want to share the same ListenUri, they must also share the same binding object instance. The two conflicting endpoints were either specified in AddServiceEndpoint() calls, in a config file, or a combination of AddServiceEndpoint() and config. at System.ServiceModel.Description.DispatcherBuilder.InitializeServiceHost(ServiceDescription description, ServiceHostBase serviceHost) at System.ServiceModel.ServiceHostBase.InitializeRuntime() at System.ServiceModel.ServiceHostBase.OnOpen(TimeSpan timeout) at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout) 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: 2012 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="2010-09-21T17:10:00.000000000Z" /> <EventRecordID>34125</EventRecordID> <Channel>Application</Channel> <Computer>exchange2010.dartford.gov.uk</Computer> <Security UserID="S-1-5-18" /> </System> <EventData> <Data>System.ServiceModel.ServiceHostingEnvironment+HostingManager/30542218</Data> <Data>System.ServiceModel.ServiceActivationException: The service '/EWS/Exchange.asmx' cannot be activated due to an exception during compilation. The exception message is: A binding instance has already been associated to listen URI 'http://exchange2010.nameremove.co.uk/EWS/Exchange.asmx'. If two endpoints want to share the same ListenUri, they must also share the same binding object instance. The two conflicting endpoints were either specified in AddServiceEndpoint() calls, in a config file, or a combination of AddServiceEndpoint() and config. . ---&gt; System.InvalidOperationException: A binding instance has already been associated to listen URI 'http://exchange2010.nameremove.co.uk/EWS/Exchange.asmx'. If two endpoints want to share the same ListenUri, they must also share the same binding object instance. The two conflicting endpoints were either specified in AddServiceEndpoint() calls, in a config file, or a combination of AddServiceEndpoint() and config. at System.ServiceModel.Description.DispatcherBuilder.InitializeServiceHost(ServiceDescription description, ServiceHostBase serviceHost) at System.ServiceModel.ServiceHostBase.InitializeRuntime() at System.ServiceModel.ServiceHostBase.OnOpen(TimeSpan timeout) at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout) 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>2012</Data> </EventData> </Event> I also get this event log error: Log Name: Application Source: MSExchange OWA Date: 21/09/2010 18:22:05 Event ID: 108 Task Category: Configuration Level: Error Keywords: Classic User: N/A Computer: exchange2010.nameremoved.co.uk Description: Outlook Web App couldn't connect Exchange Web Services due to a configuration error. Response code = "500". Event Xml: <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> <System> <Provider Name="MSExchange OWA" /> <EventID Qualifiers="49152">108</EventID> <Level>2</Level> <Task>3</Task> <Keywords>0x80000000000000</Keywords> <TimeCreated SystemTime="2010-09-21T17:22:05.000000000Z" /> <EventRecordID>34130</EventRecordID> <Channel>Application</Channel> <Computer>exchange2010.nameremoved.co.uk</Computer> <Security /> </System> <EventData> <Data>500</Data> </EventData> </Event>

Any ideas?

Hi marcrp, The Exchange 2010 Forum is the right place to seek the solution: http://social.technet.microsoft.com/Forums/en/exchange2010/threads Are you running Exchange 2010 SP1? And the error appears after you install the Exchange 2010 SP1? Do all the users have the same problem? Please check the IIS Manager->Default Web Site->Actions->Bindings... If there is a Host name existed, remove it and run IISreset /noforce. Please also run the ExBPA in the Toolbox to do a system check.Frank Wang

Apologies, I will post in the Exchange 2010 forums as well. Yes this is Exchange 2010 with SP1. As far as I can tell it did happen since applying SP1. All users have the problem. I have checked the bindings are there are no host names specified. The ExBPA comes back with nothing unusual.

I'm facing the same problem since SP1

I had same issue, but all the user. the new user is ok. but old user have issue. No one have fix yet?

A hours and hours, i find the issue (for me) In my case, i had to modify the authentification parameters in IIS management console. Caution : i'm not talking about files and folder permissions but the Authentification icon in iis management console when you click on each subfolder. For the subfolder ecp : anonymous : disabled basic : enabled digest : disabled Forms : disabled Windows : enabled ASP.NET : disabled For the subfolder EWS : anonymous : enabled basic : enabled digest : disabled Forms : disabled Windows : enabled ASP.NET : disabled For the subfolder owa : anonymous : disabled basic : enabled digest : disabled Forms : disabled Windows : enabled ASP.NET : disabled And it works, i can delete / move messages in owa !! I think that if you use Form authentification, you need to disable Basic and enable forms in those three subfolders. Arnaud

This worked for me also. Make sure you run an IISRESET in order for the changes to take affect. You can do that or just restart the World Wide Web service.

Ok, this only worked temporarly. As long as I remove the host address from my IIS bindings, this works. The problem with removing the host address is my Exchange Admin Console won't load until I put the bindings back in. There are so many posts on the internet about this problem and yet I don't see anyone (Microsoft) offering a solution.

Hi, can you give me more Infos? How you fixed this??? Many Greetings, Manuel

setting permission for EWS only worked for me. I think this stopped working after i set EWS to basic authentication to enable BIS to work for blackberry users. For the subfolder EWS : anonymous : enabled basic : enabled digest : disabled Forms : disabled Windows : enabled ASP.NET : disabled

I guess too many issue would cause this problem . like web.config and permission .... But only your one worked for me , so thank you very much I actualy added 2 https header I guess it wasnt good ;)

removing bindings with host name has fixed the issue for me. thanks a lot

We have the same problem. Can't delete/move messages in OWA - works fine in OWA Light. We're running 2003, 2007 and 2010 (just installed). Error Code is 108 Qualifiers 49152 Outlook Web App couldn't connect Exchange Web Services due to a configuration error. Response code = "null, webException.Status = SendFailure". I've spent about 8 hours goggling and trying out all the suggestions listed on the Internet. I think the key here is that 49152 Qualifier. Doesn't that number pinpoint the problem? Who can tell us what it means? BTW, our bindings are: http 80 * https 443 http 80 127.0.0.1 https 443 127.0.0.1 as well as some configured for net.tcp, net.pipe, net.msmq, msmq.formatname. No Host Name anywhere. Why does our first https have an empty IP Address? Is that a problem? I'm not able to change that from the gui. Some tests (note that the first failure here is expected) [PS] C:\program files\microsoft\Exchange Server\V14\Scripts>Test-WebServicesConnectivity -allowunsecureaccess CasServer LocalSite Scenario Result Latency(MS) Error --------- --------- -------- ------ ----------- ----- cc-x10cas1 Default-Fi... GetFolder Failure This failure occurred... cc-x10cas1 Default-Fi... GetFolder Success 78.13 cc-x10cas1 Default-Fi... SyncFolderItems Success 500.00 cc-x10cas1 Default-Fi... CreateItem Success 46.88 cc-x10cas1 Default-Fi... SyncFolderItems Success 31.25 cc-x10cas1 Default-Fi... DeleteItem Success 46.88 cc-x10cas1 Default-Fi... SyncFolderItems Success 46.88 We have SSL offloaded to an F5 Load Balancer. The SSL checkbox is unchecked everywhere. We have not set up Autodiscover on the 2010 server yet. Edit: One odd thing is that we have set up Forms Based Auth for OWA and ECP in ECM but in IIS things look differently: OWA: Enabled - Basic ECP: Enabled - Anonynous and Basic Why would there be a mismatch? Thanks in advance!

Having same issue and all the quoted solution just not working for me, mine has to do with all users not been able to click reply. They get this error below, nut it is asking for valid domain name. An unexpected error occurred and your request couldn't be handled. Request Url: https://intranet.jaizbankplc.com:443/owa/?ae=PreFormAction&a=Reply&t=IPM.Note&id=RgAAAADdLIjMFCetSID7SIuJTzRoBwBr2%2bcoZdLKR5P0l2okqOPCAAAAsDW3AABr2%2bcoZdLKR5P0l2okqOPCAAAAsaCEAAAJ&pspid=_1324227270192_724854831 User host address: 41.184.0.52 User: bellz consulting EX Address: /o=Jaiz/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=bellz consulting SMTP Address: bellz.consulting@jaizbankplc.com OWA version: 14.1.218.13 Mailbox server: JZ-SRV-005.jaiz.local Exception Exception type: System.ArgumentException Exception message: imceaDomain must be a valid domain name. Call stack Microsoft.Exchange.Data.Storage.InboundConversionOptions.CheckImceaDomain(String imceaDomain) Microsoft.Exchange.Data.Storage.InboundConversionOptions..ctor(String imceaDomain) Microsoft.Exchange.Clients.Owa.Core.Utilities.CreateInboundConversionOptions(UserContext userContext) Microsoft.Exchange.Clients.Owa.Core.ReplyForwardUtilities.CreateReplyOrReplyAllItem(BodyFormat bodyFormat, Item item, ReplyForwardFlags flags, Boolean replyAll, UserContext userContext, StoreObjectId parentFolderId) Microsoft.Exchange.Clients.Owa.Core.ReplyForwardUtilities.CreateReplyItem(BodyFormat bodyFormat, Item item, ReplyForwardFlags flags, UserContext userContext, StoreObjectId parentFolderId) Microsoft.Exchange.Clients.Owa.Premium.Controls.ItemReplyPreFormAction.Execute(OwaContext owaContext, ApplicationElement& applicationElement, String& type, String& state, String& action) Microsoft.Exchange.Clients.Owa.Core.RequestDispatcher.DoFinalDispatch(OwaContext owaContext) Microsoft.Exchange.Clients.Owa.Core.RequestDispatcher.InternalDispatchRequest(OwaContext owaContext) Microsoft.Exchange.Clients.Owa.Core.RequestDispatcher.DispatchRequest(OwaContext owaContext) Microsoft.Exchange.Clients.Owa.Core.OwaRequestEventInspector.OnPostAuthorizeRequest(Object sender, EventArgs e) System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

did you find any solution coz i have the same issue with load balancer

Exchange SP1 rollup 6 Same Issue here -- removed Host name from bindings worked for a day -- then stopped working (OWA will not delete email) Owa light works. First get Event ID 3 on the CAS Server WebHost failed to process a request. Sender Information: System.ServiceModel.ServiceHostingEnvironment+HostingManager/30542218 Exception: System.ServiceModel.ServiceActivationException: The service '/EWS/exchange.asmx' cannot be activated due to an exception during compilation. The exception message is: A binding instance has already been associated to listen URI 'http://xxxxx.root.local/EWS/Exchange.asmx'. If two endpoints want to share the same ListenUri, they must also share the same binding object instance. The two conflicting endpoints were either specified in AddServiceEndpoint() calls, in a config file, or a combination of AddServiceEndpoint() and config. . ---> System.InvalidOperationException: A binding instance has already been associated to listen URI 'http://napca01.root.local/EWS/Exchange.asmx'. If two endpoints want to share the same ListenUri, they must also share the same binding object instance. The two conflicting endpoints were either specified in AddServiceEndpoint() calls, in a config file, or a combination of AddServiceEndpoint() and config. then Event 108 Outlook Web App couldn't connect Exchange Web Services due to a configuration error. Response code = "500". Bindings are simply http/https with no host names. Any Help would be appreciated.

Same issue with F5's and the EWS directory. Did you guys manage to find a work around for this please. Ta

My Issue was in the config file -- Unfortunately my 3rd party spam provider edited my config and that fixed it - not sure what was changed - will repost if i find the change.

For anyone else stumped on this, I was able to reslove this by replacing not only the web.config under the C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\Owa folder, but also the web.config file under EWS located here: C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\exchweb\ews. This was my original alert. The precipitating events which led up to this problem involved recreating the Virtual Directories. It sounded really simple. It turned out to be a nightmare. Fortunately, I had second HUB/CAS server available. I hope this helps someone, Jason