diff --git a/litellm/proxy/guardrails/guardrail_hooks/agent_365/agent_365.py b/litellm/proxy/guardrails/guardrail_hooks/agent_365/agent_365.py
index 9ffd1111d62..6e5849a92a4 100644
--- a/litellm/proxy/guardrails/guardrail_hooks/agent_365/agent_365.py
+++ b/litellm/proxy/guardrails/guardrail_hooks/agent_365/agent_365.py
@@ -508,7 +508,7 @@ class Agent365Guardrail(CustomGuardrail):
                         return Unavailable(
                             detail=(
                                 f"Entra rejected the gateway's own Agent 365 credentials ({error.misconfigured}); "
-                                "check the guardrail's client_id, client_secret and resource_app_id"
+                                "check the guardrail's client_id and client_secret"
                             ),
                             fail_open=self.unreachable_fallback == "fail_open",
                         )
diff --git a/tests/test_litellm/proxy/guardrails/guardrail_hooks/test_agent_365.py b/tests/test_litellm/proxy/guardrails/guardrail_hooks/test_agent_365.py
index a43ffd34145..fd2f14471ce 100644
--- a/tests/test_litellm/proxy/guardrails/guardrail_hooks/test_agent_365.py
+++ b/tests/test_litellm/proxy/guardrails/guardrail_hooks/test_agent_365.py
@@ -1280,6 +1280,9 @@ class TestPreflightCallerSignIn:
         assert isinstance(verdict, Unavailable)
         assert verdict.fail_open is False
         assert "bad client_secret" in verdict.detail
+        assert "resource_app_id" not in verdict.detail, (
+            "the field was removed from the config; do not tell admins to check it"
+        )
 
     @pytest.mark.asyncio
     async def test_endpoint_unreachable_fail_open_is_unavailable(self):