diff --git a/changelog.md b/changelog.md
index f8d47dfe..2dd03ba8 100644
--- a/changelog.md
+++ b/changelog.md
@@ -6,6 +6,7 @@
 ## Developer Experience
 
 - **Authentication Configuration Validation**: Added validation for certificate, federated credential, and workload identity authentication settings
+- **Configuration Loading**: Expanded `load_configuration_from_env` to accept any mapping type
 
 ---
 
diff --git a/libraries/microsoft-agents-activity/microsoft_agents/activity/config/_load_configuration.py b/libraries/microsoft-agents-activity/microsoft_agents/activity/config/_load_configuration.py
index 9d54c740..8c851fc8 100644
--- a/libraries/microsoft-agents-activity/microsoft_agents/activity/config/_load_configuration.py
+++ b/libraries/microsoft-agents-activity/microsoft_agents/activity/config/_load_configuration.py
@@ -1,18 +1,18 @@
 # Copyright (c) Microsoft Corporation. All rights reserved.
 # Licensed under the MIT License.
 
-from typing import Any
+from typing import Any, Mapping
 
 from ._configure_logging import _configure_logging
 
 
-def load_configuration_from_env(env_vars: dict[str, Any]) -> dict:
+def load_configuration_from_env(env_vars: Mapping[str, Any]) -> dict:
     """
     Parses environment variables and returns a dictionary with the relevant configuration.
     """
-    vars = env_vars.copy()
+    local_vars = dict(env_vars)
     result = {}
-    for key, value in vars.items():
+    for key, value in local_vars.items():
         levels = key.split("__")
         current_level = result
         last_level = None
diff --git a/tests/activity/config/test_load_configuration.py b/tests/activity/config/test_load_configuration.py
index 26b881b1..aba83ad1 100644
--- a/tests/activity/config/test_load_configuration.py
+++ b/tests/activity/config/test_load_configuration.py
@@ -1,3 +1,5 @@
+from types import MappingProxyType
+
 from microsoft_agents.activity import load_configuration_from_env
 
 from tests._common import create_env_var_dict
@@ -101,3 +103,21 @@ def test_load_configuration_from_env():
     input_dict = create_env_var_dict(ENV_RAW)
     config = load_configuration_from_env(input_dict)
     assert config == ENV_DICT
+
+
+def test_load_configuration_from_read_only_mapping():
+    input_mapping = MappingProxyType(create_env_var_dict(ENV_RAW))
+
+    config = load_configuration_from_env(input_mapping)
+
+    assert config == ENV_DICT
+
+
+def test_load_configuration_from_empty_mapping():
+    config = load_configuration_from_env({})
+
+    assert config == {
+        "AGENTAPPLICATION": {},
+        "CONNECTIONS": {},
+        "CONNECTIONSMAP": [],
+    }