Insufficient enterprise tenant permissions, cannot access this API.

fail: VoiceRecorderAndPlaybackBot[1742746998]
2020-07-06T23:05:11.5197Z 00000000-0000-0000-0000-000000000000 pid:23658 tid:47 (Bot.cs:247 NotificationProcessor_OnNotificationReceived):
Caught an Exception running the task: Error processing notification /communications/calls/be1f0400-731f-489a-a110-5457d9a040c8 with scenario e5b6e28c-e545-4638-8f32-d8ff8a4e8fbf
exception: Code: 7504
Message: Insufficient enterprise tenant permissions, cannot access this API.
Inner error:
AdditionalData:
date: 2020-07-06T23:05:11
request-id: 2df32658-90f2-4b97-a39e-5f18ed3d2063

  StackTrace:    at Microsoft.Graph.Communications.Client.Transport.GraphAuthClient.ValidateResponseAsync(HttpResponseMessage response)
     at Microsoft.Graph.Communications.Client.Transport.GraphAuthClient.SendHttpRequestAsync[T1,T2](IGraphRequest`1 graphRequest, CancellationToken cancellationToken)
     at Sample.Common.Transport.GraphClientExtensions.SendAsync[T](IGraphClient client, IBaseRequest request, RequestType requestType, String tenant, Guid scenarioId, CancellationToken cancellationToken) in /Users/benjaminharvey/Desktop/microsoft-graph-comms-samples-master/Samples/Common/Sample.Common/Transport/GraphClientExtensions.cs:line 107
     at Sample.VoiceRecorderAndPlaybackBot.Bot.Bot.BotRecordsIncomingCallAsync(String callId, String tenantId, Guid scenarioId) in /Users/benjaminharvey/Desktop/microsoft-graph-comms-samples-master/Samples/V1.0Samples/StatelessSamples/VoiceRecorderAndPlaybackBot/Bot/Bot.cs:line 456
     at Sample.VoiceRecorderAndPlaybackBot.Bot.Bot.NotificationProcessor_OnNotificationReceivedAsync(NotificationEventArgs args) in /Users/benjaminharvey/Desktop/microsoft-graph-comms-samples-master/Samples/V1.0Samples/StatelessSamples/VoiceRecorderAndPlaybackBot/Bot/Bot.cs:line 310
     at Sample.Common.CommonUtilities.ForgetAndLogExceptionAsync(Task task, IGraphLogger logger, String description, String memberName, String filePath, Int32 lineNumber) in /Users/benjaminharvey/Desktop/microsoft-graph-comms-samples-master/Samples/Common/Sample.Common/CommonUtilities.cs:line 40

Start with Sample.Common/Transport/GraphClientExtensions.cs at line 107, then trace the calls from Bot.cs at lines 456 and 310. Compare the failing request with the enterprise tenant permissions available to the VoiceRecorderAndPlaybackBot. The report does not define a code change or verifiable completion condition, so the intended fix remains unclear.