Operation returned an invalid status code 'Unauthorized' - AzureAd AuthController #540
Description
After successfully authenticating the user with Bot.Builder.Community.Middleware.AzureAdAuthentication middleware, the AuthController tries to send a proactive message using this line:
connectorClient.Conversations.SendToConversation(proactiveMessage);
The above line is throwing an exception Microsoft.Bot.Schema.ErrorResponseException with message
Operation returned an invalid status code 'Unauthorized'