CRM 2013 SP1 UR 4 Onpremises and Exchange 2013 CU10 Onpremises
Some mailboxes get disabled and can't be enabled again. Outgoing profile and ACTTests all succeed but after enabling they disable immediately.
The errors:
Claus, Santa
The mailbox Claus, Santa v. has been disabled for synchronizing appointments, contacts, and tasks because an error occurred while connecting to the Microsoft Exchange server. The owner of the associated email server profile Customer Exchange has been notified.
Email Server Error Code: Web.SendFailure
Exchange sync worker for the mailbox is failed/terminated : {GUID}.
Exception details : Unhandled Exception: Microsoft.Exchange.WebServices.Data.ServiceRequestException: The request failed. The underlying connection was closed:
The connection was closed unexpectedly.
and
[2016-07-05 17:34:28.780] |Thread: 182
>Exception : Unhandled Exception: System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a send.
at System.Net.HttpWebRequest.GetResponse()
at Microsoft.Exchange.WebServices.Data.EwsHttpWebRequest.Microsoft.Exchange.WebServices.Data.IEwsHttpWebRequest.GetResponse()
at Microsoft.Exchange.WebServices.Data.ServiceRequestBase.GetEwsHttpWebResponse(IEwsHttpWebRequest request)
Inner Exception: System.IO.IOException: Unable to write data to the transport connection: An established connection was aborted by the software in your host machine.
at System.Net.Sockets.NetworkStream.MultipleWrite(BufferOffsetSize[] buffers)
at System.Net.Security._SslStream.StartWriting(SplitWritesState splitWrite, SplitWriteAsyncProtocolRequest asyncRequest)
at System.Net.Security._SslStream.ProcessWrite(BufferOffsetSize[] buffers, SplitWriteAsyncProtocolRequest asyncRequest)
at System.Net.TlsStream.MultipleWrite(BufferOffsetS...
