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Bot fails to send a message to a user

See original GitHub issue

We were testing out Company Communicator to a small group before business wide roll out, and found that one of the bot was unable to send messages to one user.

We have ensured that the user has the right App Setup policy and Permission Policy. The user was also able to see in the “Company Communicator User” app installed and this was again verified via Graph.

We had also tried to remove and readd the user into the policies but in vain. Any help is much appreciated.

Please see the error details below.

Status Reason : 403 Failed Error:

Microsoft.Bot.Schema.ErrorResponseException: Operation returned an invalid status code ‘Forbidden’ at Microsoft.Bot.Connector.Conversations.ReplyToActivityWithHttpMessagesAsync(String conversationId, String activityId, Activity activity, Dictionary

2   customHeaders, CancellationToken cancellationToken)             at   Microsoft.Bot.Connector.ConversationsExtensions.ReplyToActivityAsync(IConversations   operations, String conversationId, String activityId, Activity activity,   CancellationToken cancellationToken)             at   Microsoft.Bot.Builder.BotFrameworkAdapter.SendActivitiesAsync(ITurnContext   turnContext, Activity[] activities, CancellationToken   cancellationToken)             at   Microsoft.Bot.Builder.TurnContext.<>c__DisplayClass31_0.<<SendActivitiesAsync>g__SendActivitiesThroughAdapter|1>d.MoveNext()          --- End of stack trace from previous location where exception was thrown   ---             at   Microsoft.Bot.Builder.TurnContext.SendActivityAsync(IActivity activity,   CancellationToken cancellationToken)             at   Microsoft.Teams.Apps.CompanyCommunicator.Common.Services.Teams.MessageService.<>c__DisplayClass3_1.<<SendMessageAsync>b__1>d.MoveNext()   in C:\home\site\repository\Source\CompanyCommunicator.Common\Services\Teams\Messages\MessageService.cs:line   94          --- End of stack trace from previous location where exception was thrown   ---             at Polly.Retry.AsyncRetryEngine.ImplementationAsync[TResult](Func

3 action, Context context, CancellationToken cancellationToken, ExceptionPredicates shouldRetryExceptionPredicates, ResultPredicates1 shouldRetryResultPredicates, Func5 onRetryAsync, Int32 permittedRetryCount, IEnumerable1 sleepDurationsEnumerable, Func4 sleepDurationProvider, Boolean continueOnCapturedContext) at Polly.AsyncPolicy.ExecuteAsync[TResult](Func`3 action, Context context, CancellationToken cancellationToken, Boolean continueOnCapturedContext) at Microsoft.Teams.Apps.CompanyCommunicator.Common.Services.Teams.MessageService.<>c__DisplayClass3_0.<<SendMessageAsync>b__0>d.MoveNext() in C:\home\site\repository\Source\CompanyCommunicator.Common\Services\Teams\Messages\MessageService.cs:line 94

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