diff --git a/litellm/proxy/guardrails/guardrail_hooks/crowdstrike_aidr/crowdstrike_aidr.py b/litellm/proxy/guardrails/guardrail_hooks/crowdstrike_aidr/crowdstrike_aidr.py
index d1ef165b46..248202b644 100644
--- a/litellm/proxy/guardrails/guardrail_hooks/crowdstrike_aidr/crowdstrike_aidr.py
+++ b/litellm/proxy/guardrails/guardrail_hooks/crowdstrike_aidr/crowdstrike_aidr.py
@@ -105,6 +105,16 @@ def _extract_text_from_content(content: object) -> str:
     return ""
 
 
+def _merge_metadata_bags(request_data: Mapping[str, Any]) -> Optional[dict[str, Any]]:
+    merged: dict[str, Any] = {}
+    present = False
+    for bag in (request_data.get("metadata"), request_data.get("litellm_metadata")):
+        if isinstance(bag, Mapping):
+            present = True
+            merged.update(bag)
+    return merged if present else None
+
+
 class CrowdStrikeAIDRHandler(CustomGuardrail):
     """
     CrowdStrike AIDR AI Guardrail handler to interact with the CrowdStrike AIDR
@@ -321,8 +331,8 @@ class CrowdStrikeAIDRHandler(CustomGuardrail):
         if model:
             ai_guard_payload["model"] = model
 
-        metadata = request_data.get("litellm_metadata", request_data.get("metadata"))
-        if isinstance(metadata, Mapping):
+        metadata = _merge_metadata_bags(request_data)
+        if metadata is not None:
             user_id = metadata.get("user_api_key_user_id")
             if user_id:
                 ai_guard_payload["user_id"] = user_id
diff --git a/tests/test_litellm/proxy/guardrails/guardrail_hooks/test_crowdstrike_aidr.py b/tests/test_litellm/proxy/guardrails/guardrail_hooks/test_crowdstrike_aidr.py
index 39b62b2030..fa1c2b8e64 100644
--- a/tests/test_litellm/proxy/guardrails/guardrail_hooks/test_crowdstrike_aidr.py
+++ b/tests/test_litellm/proxy/guardrails/guardrail_hooks/test_crowdstrike_aidr.py
@@ -593,3 +593,53 @@ async def test_apply_guardrail_no_metadata_skips_user_fields(
     assert "user_id" not in payload
     assert "model" not in payload
     assert "extra_info" not in payload
+
+
+@pytest.mark.asyncio
+@pytest.mark.parametrize(
+    "litellm_metadata, metadata",
+    [
+        (None, {"user_api_key_user_id": "uid-abc", "user_api_key_user_email": "alice@example.com"}),
+        ({"trace_id": "t1"}, {"user_api_key_user_id": "uid-abc", "user_api_key_user_email": "alice@example.com"}),
+        (["unexpected"], {"user_api_key_user_id": "uid-abc", "user_api_key_user_email": "alice@example.com"}),
+        ({"user_api_key_user_id": "uid-abc", "user_api_key_user_email": "alice@example.com"}, {"trace_id": "t1"}),
+    ],
+    ids=["identity_in_metadata_llm_none", "identity_in_metadata_llm_user_dict", "identity_in_metadata_llm_non_mapping", "identity_in_litellm_metadata"],
+)
+async def test_apply_guardrail_reads_identity_from_either_metadata_bag(
+    crowdstrike_aidr_guardrail: CrowdStrikeAIDRHandler,
+    litellm_metadata,
+    metadata,
+) -> None:
+    inputs: GenericGuardrailAPIInputs = {
+        "texts": ["Hello"],
+        "structured_messages": [{"role": "user", "content": "Hello"}],
+        "model": "gpt-4o",
+    }
+    request_data = {
+        "messages": inputs["structured_messages"],
+        "model": "gpt-4o",
+        "litellm_metadata": litellm_metadata,
+        "metadata": metadata,
+    }
+    guardrail_endpoint = (
+        f"{crowdstrike_aidr_guardrail.api_base}/v1/guard_chat_completions"
+    )
+
+    with patch(
+        "litellm.llms.custom_httpx.http_handler.AsyncHTTPHandler.post",
+        return_value=httpx.Response(
+            status_code=200,
+            json={"result": {"blocked": False, "transformed": False}},
+            request=httpx.Request(method="POST", url=guardrail_endpoint),
+        ),
+    ) as mock_method:
+        await crowdstrike_aidr_guardrail.apply_guardrail(
+            inputs=inputs,
+            request_data=request_data,
+            input_type="request",
+        )
+
+    payload = mock_method.call_args.kwargs["json"]
+    assert payload["user_id"] == "uid-abc"
+    assert payload["extra_info"] == {"user_name": "alice@example.com"}