diff --git a/sdk/ai/azure-ai-projects/CHANGELOG.md b/sdk/ai/azure-ai-projects/CHANGELOG.md
index 1101a49c760b..10fa8bd1c474 100644
--- a/sdk/ai/azure-ai-projects/CHANGELOG.md
+++ b/sdk/ai/azure-ai-projects/CHANGELOG.md
@@ -11,8 +11,9 @@
 
 ### Breaking Changes
 
-* Renamed model `AgentEndpoint` to `AgentEndpointConfig`.
-* Agent Endpoint beta operations: Removed required parameters `user_isolation_key` and `chat_isolation_key` from the `HeaderIsolationKeySource` class constructor.
+* Agent Endpoint beta operations: 
+  * Renamed model `AgentEndpoint` to `AgentEndpointConfig`.
+  * Removed previously required parameters `user_isolation_key` and `chat_isolation_key` from the `HeaderIsolationKeySource` class constructor.
 
 ### Bugs Fixed
 * Fixed telemetry instrumentor to correctly call is_recording() as a method on spans, ensuring non-recording spans are properly skipped (e.g., when sampling is configured) ([GitHub issue 46544](https://github.com/Azure/azure-sdk-for-python/issues/46544)).
diff --git a/sdk/ai/azure-ai-projects/azure/ai/projects/models/_patch.py b/sdk/ai/azure-ai-projects/azure/ai/projects/models/_patch.py
index 4c9c649d30f1..69a15dc914bb 100644
--- a/sdk/ai/azure-ai-projects/azure/ai/projects/models/_patch.py
+++ b/sdk/ai/azure-ai-projects/azure/ai/projects/models/_patch.py
@@ -8,6 +8,7 @@
 Follow our quickstart for examples: https://aka.ms/azsdk/python/dpcodegen/python/customize
 """
 
+import warnings
 from typing import Final, FrozenSet, List, Dict, Mapping, Optional, Any, Tuple
 from azure.core.polling import LROPoller, AsyncLROPoller, PollingMethod, AsyncPollingMethod
 from azure.core.polling.base_polling import (
@@ -390,6 +391,38 @@ def from_continuation_token(
 ]  # Add all objects you want publicly available to users at this package level
 
 
+# Deprecated names handled via _models_getattr injected by patch_sdk()
+_DEPRECATED_NAMES: Dict[str, str] = {
+    # Deprecated Name: Replacement Name
+    "AgentEndpoint": "AgentEndpointConfig",  # Deprecated in v2.2.0
+}
+
+def _models_getattr(name: str) -> Any:
+    """Module-level __getattr__ for deprecation warnings on azure.ai.projects.models.
+
+    This function is injected into the models module by patch_sdk() to handle
+    deprecated name lookups (PEP 562).
+
+    :param name: The attribute name being accessed.
+    :type name: str
+    :return: The replacement attribute value.
+    :rtype: Any
+    :raises AttributeError: If the attribute is not found.
+    """
+    import sys
+
+    if name in _DEPRECATED_NAMES:
+        replacement = _DEPRECATED_NAMES[name]
+        warnings.warn(
+            f"'{name}' is deprecated and will be removed in the next release. "
+            f"Use '{replacement}' instead.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return getattr(sys.modules["azure.ai.projects.models"], replacement)
+    raise AttributeError(f"module 'azure.ai.projects.models' has no attribute {name!r}")
+
+
 def patch_sdk():
     """Do not remove from this file.
 
@@ -397,3 +430,9 @@ def patch_sdk():
     you can't accomplish using the techniques described in
     https://aka.ms/azsdk/python/dpcodegen/python/customize
     """
+    import sys
+
+    # Inject __getattr__ into the models module for PEP 562 deprecation handling (https://peps.python.org/pep-0562/)
+    models_module = sys.modules.get("azure.ai.projects.models")
+    if models_module is not None:
+        models_module.__getattr__ = _models_getattr  # type: ignore[attr-defined]
diff --git a/sdk/ai/azure-ai-projects/tests/deprecation/test_agent_endpoint_deprecation.py b/sdk/ai/azure-ai-projects/tests/deprecation/test_agent_endpoint_deprecation.py
new file mode 100644
index 000000000000..97633623523b
--- /dev/null
+++ b/sdk/ai/azure-ai-projects/tests/deprecation/test_agent_endpoint_deprecation.py
@@ -0,0 +1,71 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+"""Tests for AgentEndpoint deprecation warning."""
+
+import warnings
+
+class TestAgentEndpointDeprecation:
+    """Test that AgentEndpoint is deprecated but still functional (PEP 562 __getattr__)."""
+
+    def test_agent_endpoint_emits_deprecation_warning_on_access(self):
+        """Test that accessing AgentEndpoint emits a DeprecationWarning (PEP 562)."""
+        import azure.ai.projects.models as models
+
+        with warnings.catch_warnings(record=True) as w:
+            warnings.simplefilter("always")
+            # Warning is emitted on attribute access, not instantiation
+            _ = models.AgentEndpoint  # type: ignore[attr-defined]
+
+            assert len(w) == 1
+            assert issubclass(w[0].category, DeprecationWarning)
+            assert "AgentEndpoint" in str(w[0].message)
+            assert "AgentEndpointConfig" in str(w[0].message)
+
+    def test_agent_endpoint_config_no_warning(self):
+        """Test that using AgentEndpointConfig does not emit a warning."""
+        import azure.ai.projects.models as models
+
+        with warnings.catch_warnings(record=True) as w:
+            warnings.simplefilter("always")
+            _ = models.AgentEndpointConfig
+            config = models.AgentEndpointConfig()
+
+            # Filter only DeprecationWarnings related to AgentEndpoint
+            deprecation_warnings = [
+                warning for warning in w
+                if issubclass(warning.category, DeprecationWarning)
+                and "AgentEndpoint" in str(warning.message)
+            ]
+            assert len(deprecation_warnings) == 0
+
+    def test_agent_endpoint_is_same_class_as_config(self):
+        """Test that AgentEndpoint returns the same class as AgentEndpointConfig (PEP 562)."""
+        import azure.ai.projects.models as models
+
+        with warnings.catch_warnings():
+            warnings.simplefilter("ignore", DeprecationWarning)
+            # With PEP 562 __getattr__, AgentEndpoint IS AgentEndpointConfig
+            assert models.AgentEndpoint is models.AgentEndpointConfig  # type: ignore[attr-defined]
+
+    def test_agent_endpoint_instance_is_config_instance(self):
+        """Test that AgentEndpoint instance is also an AgentEndpointConfig instance."""
+        import azure.ai.projects.models as models
+
+        with warnings.catch_warnings():
+            warnings.simplefilter("ignore", DeprecationWarning)
+            endpoint = models.AgentEndpoint()  # type: ignore[attr-defined]
+
+        assert isinstance(endpoint, models.AgentEndpointConfig)
+
+    def test_agent_endpoint_functionality_preserved(self):
+        """Test that AgentEndpoint still works with all its parameters."""
+        import azure.ai.projects.models as models
+
+        with warnings.catch_warnings():
+            warnings.simplefilter("ignore", DeprecationWarning)
+            endpoint = models.AgentEndpoint(  # type: ignore[attr-defined]
+                protocols=[models.AgentEndpointProtocol.A2A],
+            )
+
+        assert endpoint.protocols == [models.AgentEndpointProtocol.A2A]