diff --git a/libraries/integration/Microsoft.Bot.Builder.Integration.AspNet.Core/BotFrameworkHttpAdapter.cs b/libraries/integration/Microsoft.Bot.Builder.Integration.AspNet.Core/BotFrameworkHttpAdapter.cs
index afde82d047..13e8ecac4f 100644
--- a/libraries/integration/Microsoft.Bot.Builder.Integration.AspNet.Core/BotFrameworkHttpAdapter.cs
+++ b/libraries/integration/Microsoft.Bot.Builder.Integration.AspNet.Core/BotFrameworkHttpAdapter.cs
@@ -164,6 +164,7 @@ public async Task ProcessAsync(HttpRequest httpRequest, HttpResponse httpRespons
                 if (string.IsNullOrEmpty(activity?.Type))
                 {
                     httpResponse.StatusCode = (int)HttpStatusCode.BadRequest;
+                    Logger.LogWarning("BadRequest: Missing activity or activity type.");
                     return;
                 }
 
diff --git a/libraries/integration/Microsoft.Bot.Builder.Integration.AspNet.Core/CloudAdapter.cs b/libraries/integration/Microsoft.Bot.Builder.Integration.AspNet.Core/CloudAdapter.cs
index ec91629c82..eb5e0e87d1 100644
--- a/libraries/integration/Microsoft.Bot.Builder.Integration.AspNet.Core/CloudAdapter.cs
+++ b/libraries/integration/Microsoft.Bot.Builder.Integration.AspNet.Core/CloudAdapter.cs
@@ -94,6 +94,7 @@ public async Task ProcessAsync(HttpRequest httpRequest, HttpResponse httpRespons
                     if (string.IsNullOrEmpty(activity?.Type))
                     {
                         httpResponse.StatusCode = (int)HttpStatusCode.BadRequest;
+                        Logger.LogWarning("BadRequest: Missing activity or activity type.");
                         return;
                     }