Azure ATP connection closed errors

Hello, 

I just deployed Azure ATP in a fresh demo environment. No errors during installation, also when I search for computers or users I do get details, however when I try to trigger an alert by running nslookup -ls -d or run mimikatz, I don't get any alerts in Azure ATP. 

The Sensor is installed on a domain controller server 2016 standard , sensor agent version is

2.59.6040.997

The domain controller runs in hyper-v and has two nics, one uses the default switch and the other is a private network for the lab. 

The Microsoft.Tri.Sensor-Errors log file contains the following errors. 

2019-01-03 17:38:50.3349 Error ExceptionDispatchInfo System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: The underlying connection was closed: A connection that was expected to be kept alive was closed by the server. ---> System.IO.IOException: Unable to read data from the transport connection: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. ---> System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond
   at int System.Net.Sockets.Socket.EndReceive(IAsyncResult asyncResult)
   at int System.Net.Sockets.NetworkStream.EndRead(IAsyncResult asyncResult)
   --- End of inner exception stack trace ---
   at int System.Net.Security._SslStream.EndRead(IAsyncResult asyncResult)
   at int System.Net.TlsStream.EndRead(IAsyncResult asyncResult)
   at void System.Net.Connection.ReadCallback(IAsyncResult asyncResult)
   --- End of inner exception stack trace ---
   at WebResponse System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at void System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar)
   --- End of inner exception stack trace ---
   at async Task<HttpResponseMessage> System.Net.Http.HttpClient.FinishSendAsyncBuffered(Task<HttpResponseMessage> sendTask, HttpRequestMessage request, CancellationTokenSource cts, bool disposeCts)
   at async Task<TResponse> Microsoft.Tri.Common.CommunicationWebClient.SendAsync<TResponse>(byte[] requestBytes, int offset, int count)
   at async Task<TResponse> Microsoft.Tri.Common.CommunicationWebClient.SendAsync<TResponse>(IRequestWithResponse<TResponse> request)
   at async Task<TResponse> Microsoft.Tri.Sensor.Common.ServiceProxy<TWebClientConfiguration>.SendAsync<TResponse>(IRequestWithResponse<TResponse> request)
   at async Task Microsoft.Tri.Sensor.EntitySender.SendEntityBatchAsync(EntityBatch entityBatch, EntityBatch postponedEntityBatch)
   at async Task Microsoft.Tri.Sensor.EntitySender.SendEntityBatchesAsync()

Any hints where to look wuld be appreciated.