I found an article, that you have to recyle (scheduled the msexchangeautodiscoverpool every 1 min. uninstall update spoofing fix exchange 2016 (cu12)Īfter a lot of google i figures out, i did the following: 005, w3wp#MSExchangeSyncAppPool, M.E.Data.Storage, M.E.D.S.FolderSync.Recover, System.ArgumentOutOfRangeException, fa5b-dumptidset. Watson report about to be sent for process id: 4200, with parameters: E12, c-RTL-AMD64.

End of stack trace from previous location where exception was thrown -Īt .Throw()Īt .HandleNonSuccessAndDebuggerNotification(Task task)Īt .EwsHttpWebRequest.d_64.MoveNext()Īt .() Message: The remote server returned an error: (503) Server Unavailable.Īt (IAsyncResult asyncResult)Īt `1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization) Type: .ServiceRequestExceptionĪt .ServiceRequestBase.GetEwsHttpWebResponse(IEwsHttpWebRequest request)Īt .ServiceRequestBase.ValidateAndEmitRequest(IEwsHttpWebRequest& request)Īt .MultiResponseServiceRequest`1.Execute()Īt .ExchangeService.BindToFolder(FolderId folderId, PropertySet propertySet)Īt .() The remote server returned an error: (503) Server Unavailable. (everytime different proc.ID xxxxx)Ĭonnectivity test on microsoft site eventually will fail, this is the last message: The data field contains the error number. (since 2-5-2019), no system changes, error occured on all 3 servers same behaviour.ģ exchange servers 2016 cu12 / windows 2016.ĮWS clients cannot connect anymore (outlook for mac, mac mail) all EWS related communication.Ī process serving application pool 'MSExchangeServicesAppPool' suffered a fatal communication error with the Windows Process Activation Service.

Outlook for mac not connecting