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.
