Calls from Teams to Exchange Server 2016 Unified Messaging voice mail fail

Time:     DateTime

ID:         1079

Level:     Warning

Source: MSExchange Unified Messaging

Machine:  <Exchange Server FQDN>

Message:  The VoIP platform encountered an exception FailureReason = 0

Microsoft.Rtc.Collaboration.CallOperationFailureException:An internal media error occurred ---> Microsoft.Rtc.Collaboration.OfferAnswerException:An internal media error occurred ---> Microsoft.Rtc.Internal.Media.EndpointException: Cannot set the transport parameter.

   at Microsoft.Rtc.Internal.Media.RtpEndpoint.EngineSetTransportParameter(CTransportHandle TransportHandle, UInt32 ulParamName, Void* pParamValue)

   at Microsoft.Rtc.Internal.Media.RtpEndpoint.UpdateRemoteEndpoints(RtpIceImplementationType RemoteIceType)

   at Microsoft.Rtc.Collaboration.AudioVideo.MediaSessionAgent.ProcessInstantiateNewMediaWorkitem(InstantiateNewMediaWorkitemAsyncResult prepareNewMediaWorkitem) Inner hr : 0xC0044003

   

--- End of inner exception stack trace ---

   at Microsoft.Rtc.Signaling.SipAsyncResult`1.ThrowIfFailed()

   at Microsoft.Rtc.Signaling.Helper.EndAsyncOperation[T](Object owner, IAsyncResult result)

   at Microsoft.Rtc.Collaboration.Call.EstablishCoreAsyncResult.OfferAnswerRequestCompleted(IAsyncResult result)

Detected at System.Environment.GetStackTrace(Exception e, Boolean needFileInfo)

   at System.Environment.get_StackTrace()

   at Microsoft.Rtc.Collaboration.OfferAnswerException..ctor(OfferAnswerFailureReason reason, String message, Exception innerException, IEnumerable`1 signalingHeaders, DiagnosticsInformation diagnosticsInformation)

   at Microsoft.Rtc.Collaboration.AudioVideo.MediaSessionAgent.CreateOfferAnswerException(OfferAnswerFailureReason type, Exception e, UInt32 errorCode, RtpEndpoint endpointForDiagBlob)

   at Microsoft.Rtc.Collaboration.AudioVideo.MediaSessionAgent.ProcessInstantiateNewMediaWorkitem(InstantiateNewMediaWorkitemAsyncResult prepareNewMediaWorkitem)

   at Microsoft.Rtc.Signaling.WorkitemQueue.ProcessItems()

   at Microsoft.Rtc.Signaling.QueueWorkItemState.ExecuteWrappedMethod(WaitCallback method, Object state)

   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)

   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)

   at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()

   at System.Threading.ThreadPoolWorkQueue.Dispatch()

   

--- End of inner exception stack trace ---

   at Microsoft.Rtc.Signaling.SipAsyncResult`1.ThrowIfFailed()

   at Microsoft.Rtc.Signaling.Helper.EndAsyncOperation[T](Object owner, IAsyncResult result)

   at Microsoft.Rtc.Collaboration.Call.EndAcceptCore(IAsyncResult result)

   at Microsoft.Exchange.UM.UcmaPlatform.UcmaCallSession.AcceptCallSessionState.Call_AcceptCompleted(IAsyncResult r)

   at Microsoft.Exchange.UM.UcmaPlatform.UcmaCallSession.SubscriptionHelper.<>c__DisplayClass20_1`1.<WrapCallback>b__1()

   at Microsoft.Exchange.UM.UcmaPlatform.UcmaCallSession.<>c__DisplayClass192_0.<CatchAndFireOnError>b__0()

Detected at System.Environment.GetStackTrace(Exception e, Boolean needFileInfo)

   at System.Environment.get_StackTrace()

   at Microsoft.Rtc.Collaboration.CallOperationFailureException..ctor(String message, Exception innerException, CallOperationFailureReason reason)

   at Microsoft.Rtc.Collaboration.Call.EstablishCoreAsyncResult.OfferAnswerRequestCompleted(IAsyncResult result)

   at Microsoft.Rtc.Signaling.SipAsyncResult`1.MakeCallback(Object state)

   at Microsoft.Rtc.Signaling.SipAsyncResult`1.Complete(TEx ex, Boolean synchronousCompletion)

   at Microsoft.Rtc.Collaboration.ComponentModel.MediaProvider.AnswerAsyncResult.GetAnswerCompleted(IAsyncResult result)

   at Microsoft.Rtc.Signaling.WorkitemQueue.ProcessItems()

   at Microsoft.Rtc.Signaling.QueueWorkItemState.ExecuteWrappedMethod(WaitCallback method, Object state)

   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)

   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callbac during the call with ID "<unique call ID here>". This exception occurred at the Microsoft Exchange Speech Engine VoIP platform during an event-based asynchronous operation submitted by the server. The server will attempt to recover from this exception. If this warning occurs frequently, contact Microsoft Product Support.

A SIP/2.0 500 Internal Server Error will be found in SIPstack logs with the following diagnostic information:

ms-diagnostics: 24014;Component="RTCC/5.0.0.0_MSExchangeUM/<IP address>";Reason="An internal media error occurred";Source="<fqdn of Exchange UM server>"