Exchange Server 2016 - EWS terminated

Question

Hello,

I have 2 Exchange Server 2016 (DAG) and EWS terminated on both server every minute with following error:

An unhandled exception occurred and the process was terminated.

Application ID: /LM/W3SVC/2/ROOT/EWS

Process ID: 14160

Exception: System.MissingMethodException

Message: Method not found: 'Microsoft.Exchange.WebServices.Data.GetClientExtensionResponse Microsoft.Exchange.WebServices.Data.ExchangeService.GetClientExtension(Microsoft.Exchange.WebServices.Data.StringList, Boolean, Boolean, System.String, Microsoft.Exchange.WebServices.Data.StringList, Microsoft.Exchange.WebServices.Data.StringList, Boolean, Boolean)'.

StackTrace: at Microsoft.Exchange.Data.ApplicationLogic.Extension.EwsOrgExtensionRetriever.<>c__DisplayClass5_0.<Retrieve>b__0()

at Microsoft.Exchange.Data.ApplicationLogic.Extension.OrgExtensionTable.ExecuteWebServicesAction(Action webServicesAction)

at Microsoft.Exchange.Data.ApplicationLogic.Extension.EwsOrgExtensionRetriever.Retrieve(OrgExtensionRetrievalContext context)

at Microsoft.Exchange.Data.ApplicationLogic.Extension.CachedOrgExtensionRetriever.Retrieve(OrgExtensionRetrievalContext context)

at Microsoft.Exchange.Data.ApplicationLogic.Extension.OrgExtensionDataGetter.GetAllOrgExtensionData(OrgExtensionRetrievalContext context)

at Microsoft.Exchange.Data.ApplicationLogic.Extension.OrgExtensionTable.GetOrgExtensions(IOrgExtensionDataGetter orgExtensionDataGetter, OrgExtensionRetrievalContext retrievalContext, Boolean shouldRetrievePrivateCatalogExtensions, Boolean retrieveOnly1_0)

at Microsoft.Exchange.Data.ApplicationLogic.Extension.InstalledExtensionTable.GetOrgProvidedExtensions(HashSet1 requestedExtensions, Boolean shouldReturnEnabledOnly, Dictionary2 masterTableExtensions, Boolean isDebug, Boolean shouldRetrievePrivateCatalogExtensions, String& orgMasterTableRawXml, Boolean shouldReturnECPAddins)

at Microsoft.Exchange.Data.ApplicationLogic.Extension.InstalledExtensionTable.GetProvidedExtensions(HashSet1 requestedExtensions, Boolean shouldReturnEnabledOnly, Dictionary2 masterTableExtensions, Boolean isDebug, Boolean shouldRetrievePrivateCatalogExtensions, String& orgMasterTableRawXml, Boolean shouldReturnECPAddins)

at Microsoft.Exchange.Data.ApplicationLogic.Extension.InstalledExtensionTable.GetExtensions(HashSet1 requestedExtensions, Boolean shouldReturnEnabledOnly, Boolean shouldFailOnGetOrgExtensionsTimeout, Boolean isDebug, String& orgMasterTableRawXml, CultureInfo culture, Boolean filterOutDuplicateMasterTableExtensions, Boolean shouldRetrievePrivateCatalogExtensions, MultiValuedProperty1 capabilities, Boolean shouldReturnECPAddins)

at Microsoft.Exchange.Services.Wcf.GetExtensibilityContext.GetExtensions(ICallContext callContext, Boolean isUserScope, Boolean shouldReturnEnabledOnly, Boolean shouldFailOnGetOrgExtensionsTimeout, OrgEmptyMasterTableCache orgEmptyMasterTableCache, ExtensionsCache extensionsCache, HashSet1 requestedExtensions, Boolean isRawXmlRequired, Boolean shouldRetrievePrivateCatalogExtensions, Nullable1 orgExtensionVersion, Boolean checkForExpiryOfUserCacheOfOrgExtensions, String& masterTableRawXml, Boolean retrieveOnly1_0, Boolean filterOutDuplicateMasterTableExtensions, Version apiVersionSupported, Boolean shouldReturnECPAddins)

at Microsoft.Exchange.Services.Core.GetAppManifests.GetExtensionDataList(HashSet`1 privateCatalogAddIns, Version schemaVersionSupported, Boolean shouldIncludeAllInstalledAddIns, Boolean shouldReturnECPAddins)

at Microsoft.Exchange.Services.Core.GetAppManifests.<>c__DisplayClass12_0.<ExecuteGetAppManifests>b__0()

at Microsoft.Exchange.Data.ApplicationLogic.Extension.InstalledExtensionTable.RunClientExtensionAction(Action action)

at Microsoft.Exchange.Services.Wcf.GetExtensibilityContext.RunClientExtensionAction(Action action, Exception& exception)

at Microsoft.Exchange.Services.Core.GetAppManifests.ExecuteGetAppManifests(Exception& clientExtensionException)

at Microsoft.Exchange.Services.Core.GetAppManifests.Execute()

at Microsoft.Exchange.Services.Core.ExceptionHandler`1.Execute(IRequestDetailsLogger logger, CreateServiceResult createServiceResult, Int32 index, ExecutionOption executionOption)

at Microsoft.Exchange.Services.Core.BaseStepServiceCommand`3.InternalExecuteStep(Boolean& isBatchStopResponse)

at Microsoft.Exchange.Services.Core.ServiceCommandBase`1.<ExecuteStep>b__82_0()

at Microsoft.Exchange.Services.Core.ServiceCommandBase`1.<>c__DisplayClass88_0.<ExecuteHelper>b__0()

at Microsoft.Exchange.Common.IL.ILUtil.DoTryFilterCatch(Action tryDelegate, Func2 filterDelegate, Action1 catchDelegate)

at Microsoft.Exchange.Services.Core.ServiceDiagnostics.SendWatsonReportOnUnhandledException(ICallContext callContext, Action methodDelegate)

at Microsoft.Exchange.Services.Core.ServiceCommandBase1.ExecuteHelper(Func1 action)

at Microsoft.Exchange.Services.Core.Types.ServiceTask`1.<>c__DisplayClass11_0.<ExecuteHelper>b__0()

at Microsoft.Exchange.Common.IL.ILUtil.DoTryFilterCatch(Action tryDelegate, Func2 filterDelegate, Action1 catchDelegate)

at Microsoft.Exchange.Services.Core.Types.BaseServiceTask`1.SendWatsonReportOnGrayException(Action callback, Action exceptionHandlerCallback, Boolean isGrayExceptionTaskFailure)

at Microsoft.Exchange.Services.Core.Types.ServiceTask1.ExecuteHelper(Func1 multiStepAction)

at Microsoft.Exchange.Services.Core.Types.ServiceTask`1.<InternalExecute>b__7_0()

at Microsoft.Exchange.Diagnostics.RequestDetailsLoggerBase1.TrackLatency[TResult](Enum latencyMetadata, Func1 method)

at Microsoft.Exchange.Diagnostics.RequestDetailsLoggerBase1.TrackLatency[TResult](Enum latencyMetadata, Func1 method, Double& latencyValue)

at Microsoft.Exchange.Services.Core.Types.ServiceTask`1.InternalExecute(TimeSpan queueAndDelay, TimeSpan totalTime)

at Microsoft.Exchange.Services.Core.Types.BaseServiceTask`1.<>c__DisplayClass33_0.<Execute>b__0()

at Microsoft.Exchange.Services.Core.Types.BaseServiceTask`1.LocalTimedCall(Action action)

at Microsoft.Exchange.Services.Core.Types.BaseServiceTask`1.ExecuteWithinCallContext(Action action)

at Microsoft.Exchange.Services.Core.Types.BaseServiceTask`1.Execute(TimeSpan queueAndDelayTime, TimeSpan totalTime)

at Microsoft.Exchange.Services.Core.Types.BaseServiceTask`1.ExecuteLoop(Boolean synchronously)

at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)

at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)

at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()

at System.Threading.ThreadPoolWorkQueue.Dispatch()

Can any help me?

thanks

Regards

Andreas

Answer 1

Hi @Andreas Sinn,

Welcome to the Microsoft Q&A platform!

According to your description, you are currently experiencing a "System.MissingMethodException" error, which means there is a difference between the versions of the referenced assemblies, which is usually the result of an update or file mismatch. You can try to solve the problem by following the steps below:

1. Verify and Update Exchange CU:

   Ensure that both of your Exchange 2016 servers are running the same Cumulative Update (CU). You can check the current CU by running the following command in the Exchange Management Shell:

   Get-ExchangeServer | Format-List Name,Edition,AdminDisplayVersion

   If they are not on the same CU, update them accordingly. You can download the latest CU from Microsoft's official site.

2. Check for .NET Framework Compatibility:

   Ensure that the .NET Framework version installed on your servers is compatible with the CU of Exchange 2016 you have. Exchange 2016 CU18 and later require .NET Framework 4.8.

   You can verify the installed .NET version by checking the registry:

   Get-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full' -Name Release

   Compare the release value to the .NET Framework versions listed on Microsoft's documentation to ensure compatibility.

3. Validate Web.Config and Exchange Services:

   Ensure that the EWS virtual directory is correctly configured:

   Get-WebServicesVirtualDirectory | Format-List name, url

   Also, check and compare the web.config file for EWS on both servers. There may be customizations or discrepancies leading to the issue.

4. Cleanup and Verify DLLs:

   The error might be due to the presence of incorrect or outdated DLLs.

   - Navigate to the Exchange bin directory (usually C:\Program Files\Microsoft\Exchange Server\V15\Bin), and ensure that all the DLLs are the correct version.

   - Compare the Microsoft.Exchange.WebServices.dll versions between the two servers to ensure consistency.

5. Event Logs:

   Check the Application and System event logs for any additional errors or warnings that may provide more context. Sometimes, the root cause will be logged there.

6. Re-create Virtual Directories:

   If the issue persists, you might need to re-create the EWS virtual directory. Here’s how you can do that:

   Remove-WebServicesVirtualDirectory -Identity "ServerName\EWS (Default Web Site)"

   New-WebServicesVirtualDirectory -Server "ServerName" -InternalUrl "https://mail.contoso.com/EWS/Exchange.asmx"

   Ensure to replace "ServerName" with your actual server name, and adjust the InternalUrl as per your environment.

7. Post-Update Maintenance:

   Run the Exchange server post-update scripts to ensure that everything is correctly configured.

   (Get-ChildItem 'C:\Program Files\Microsoft\Exchange Server\V15\Scripts' -Filter "Update-*.ps1").FullName | ForEach-Object { & "$_" }

Please feel free to contact me if you have any queries.

Best,

Jake Zhang