Событие MSExchange Mid-Tier Storage:3019 на Exchange 2013

У меня есть событие 3019 на Exchange 2013 с источником «MSExchange Mid-Tier Storage», и я не смог найти в сети никаких ссылок на это. О других отказах не сообщается. Сервер обслуживает клиентов в обычном режиме.

Версия:Exchange 2013 CU19
Номер сборки :15.00.1365.001
Установлен на Windows Server 2012R2 64-бит
На сервере есть 2 базы данных почтовых ящиков на одном компьютере, каждая на другом жестком диске.

Вот полное сообщение.:

Synchronization of discovery and hold configuration to Microsoft Exchange online failed because of error:
Microsoft.Exchange.Data.DataSourceOperationException: The request failed. The remote server returned an error: (401) Unauthorized. ---> Microsoft.Exchange.WebServices.Data.ServiceRequestException: The request failed. The remote server returned an error: (401) Unauthorized. ---> System.Net.WebException: The remote server returned an error: (401) Unauthorized.
   at System.Net.HttpWebRequest.GetResponse()
   at Microsoft.Exchange.Data.Storage.Management.EwsHttpWebRequestEx.Microsoft.Exchange.WebServices.Data.IEwsHttpWebRequest.GetResponse()
   at Microsoft.Exchange.WebServices.Data.ServiceRequestBase.GetEwsHttpWebResponse(IEwsHttpWebRequest request)
   --- End of inner exception stack trace ---
   at Microsoft.Exchange.WebServices.Data.ServiceRequestBase.GetEwsHttpWebResponse(IEwsHttpWebRequest request)
   at Microsoft.Exchange.WebServices.Data.ServiceRequestBase.ValidateAndEmitRequest(IEwsHttpWebRequest& request)
   at Microsoft.Exchange.WebServices.Data.MultiResponseServiceRequest`1.Execute()
   at Microsoft.Exchange.WebServices.Data.ExchangeService.FindFolders(FolderId parentFolderId, SearchFilter searchFilter, FolderView view)
   at Microsoft.Exchange.Data.Storage.Management.EwsStoreDataProvider.InvokeServiceCall[T](Func`1 callback)
   --- End of inner exception stack trace ---
   at Microsoft.Exchange.Data.Storage.Management.EwsStoreDataProvider.InvokeServiceCall[T](Func`1 callback)
   at Microsoft.Exchange.Data.Storage.Management.EwsStoreDataProvider.GetOrCreateFolderCore(String folderName, FolderId parentFolder, Func`1 creator)
   at Microsoft.Exchange.Data.Storage.Infoworker.MailboxSearch.DiscoverySearchDataProvider.GetDefaultFolder()
   at Microsoft.Exchange.Data.Storage.Management.EwsStoreDataProvider.get_DefaultFolder()
   at Microsoft.Exchange.Data.Storage.Management.EwsStoreDataProvider.<>c__DisplayClass1b`1.<InternalFindPaged>b__13()
   at Microsoft.Exchange.Data.Storage.Management.EwsStoreDataProvider.InvokeServiceCall[T](Func`1 callback)
   at Microsoft.Exchange.Data.Storage.Management.EwsStoreDataProvider.<InternalFindPaged>d__21`1.MoveNext()
   at Microsoft.Exchange.MailboxAssistants.Assistants.ELC.DiscoveryHoldSynchronizer.GetDiscoveryHolds(DiscoverySearchDataProvider dataProvider, Dictionary`2 discoveryHolds)
   at Microsoft.Exchange.MailboxAssistants.Assistants.ELC.DiscoveryHoldSynchronizer.Synchronize(Object argument)
   at System.Threading.Tasks.Task.Execute()