diff --git a/sdk/ml/azure-ai-ml/CHANGELOG.md b/sdk/ml/azure-ai-ml/CHANGELOG.md
index c3a3a14f2a3b..385b51093346 100644
--- a/sdk/ml/azure-ai-ml/CHANGELOG.md
+++ b/sdk/ml/azure-ai-ml/CHANGELOG.md
@@ -3,7 +3,7 @@
 ## 0.2.0 (Unreleased)
 
 ### Features Added
-
+ - Most configuration classes from the entity package now implement the standard mapping protocol.
 ### Breaking Changes
 
 ### Bugs Fixed
@@ -15,7 +15,7 @@
 - Dropped support for Python 3.6. The Python versions supported for this release are 3.7-3.10.
 
 ### Features Added
-
+ 
 ### Breaking Changes
 - OnlineDeploymentOperations.delete has been renamed to begin_delete.
 - Datastore credentials are switched to use unified credential configuration classes.
diff --git a/sdk/ml/azure-ai-ml/azure/ai/ml/entities/_compute/compute_instance.py b/sdk/ml/azure-ai-ml/azure/ai/ml/entities/_compute/compute_instance.py
index 85978b6a9821..2eb0a8188841 100644
--- a/sdk/ml/azure-ai-ml/azure/ai/ml/entities/_compute/compute_instance.py
+++ b/sdk/ml/azure-ai-ml/azure/ai/ml/entities/_compute/compute_instance.py
@@ -20,6 +20,7 @@
 from azure.ai.ml.constants._common import BASE_PATH_CONTEXT_KEY, TYPE
 from azure.ai.ml.constants._compute import ComputeDefaults, ComputeType
 from azure.ai.ml.entities._compute.compute import Compute, NetworkSettings
+from azure.ai.ml.entities._mixins import DictMixin
 from azure.ai.ml.entities._util import load_from_dict
 from azure.ai.ml.exceptions import ErrorCategory, ErrorTarget, ValidationException
 from azure.ai.ml.entities._credentials import IdentityConfiguration
@@ -70,7 +71,7 @@ def ssh_port(self) -> str:
         return self._ssh_port
 
 
-class AssignedUserConfiguration:
+class AssignedUserConfiguration(DictMixin):
     """Settings to create a compute on behalf of another user."""
 
     def __init__(self, *, user_tenant_id: str, user_object_id: str):
diff --git a/sdk/ml/azure-ai-ml/azure/ai/ml/entities/_deployment/code_configuration.py b/sdk/ml/azure-ai-ml/azure/ai/ml/entities/_deployment/code_configuration.py
index b09dacb52283..3fc3da9f272b 100644
--- a/sdk/ml/azure-ai-ml/azure/ai/ml/entities/_deployment/code_configuration.py
+++ b/sdk/ml/azure-ai-ml/azure/ai/ml/entities/_deployment/code_configuration.py
@@ -6,12 +6,13 @@
 
 from azure.ai.ml._restclient.v2021_10_01.models import CodeConfiguration as RestCodeConfiguration
 from azure.ai.ml.entities._assets import Code
+from azure.ai.ml.entities._mixins import DictMixin
 from azure.ai.ml.exceptions import ErrorCategory, ErrorTarget, ValidationException
 
 module_logger = logging.getLogger(__name__)
 
 
-class CodeConfiguration:
+class CodeConfiguration(DictMixin):
     """CodeConfiguration.
 
     :param code: Code entity, defaults to None
diff --git a/sdk/ml/azure-ai-ml/azure/ai/ml/entities/_job/pipeline/_io.py b/sdk/ml/azure-ai-ml/azure/ai/ml/entities/_job/pipeline/_io.py
index fe57e1f71948..1c080373355f 100644
--- a/sdk/ml/azure-ai-ml/azure/ai/ml/entities/_job/pipeline/_io.py
+++ b/sdk/ml/azure-ai-ml/azure/ai/ml/entities/_job/pipeline/_io.py
@@ -170,6 +170,9 @@ def _data_binding(self) -> str:
         """Return data binding string representation for this input/output."""
         raise NotImplementedError()
 
+    # Why did we have this function? It prevents the DictMixin from being applied.
+    # Unclear if we explicitly do NOT want the mapping protocol to be applied to this, or it this was just
+    # confirmation that it didn't at the time.
     def keys(self):
         # This property is introduced to raise catchable Exception in marshmallow mapping validation trial.
         raise TypeError(f"'{type(self).__name__}' object is not a mapping")
diff --git a/sdk/ml/azure-ai-ml/azure/ai/ml/entities/_mixins.py b/sdk/ml/azure-ai-ml/azure/ai/ml/entities/_mixins.py
index 5ebf761d2f8b..eee003c3a8f4 100644
--- a/sdk/ml/azure-ai-ml/azure/ai/ml/entities/_mixins.py
+++ b/sdk/ml/azure-ai-ml/azure/ai/ml/entities/_mixins.py
@@ -17,6 +17,12 @@ def _from_rest_object(cls, obj: Any) -> Any:
 
 
 class DictMixin(object):
+    def __contains__(self, item):
+        return self.__dict__.__contains__(item)
+
+    def __iter__(self):
+        return self.__dict__.__iter__()
+
     def __setitem__(self, key, item):
         # type: (Any, Any) -> None
         self.__dict__[key] = item