diff --git a/sdk/resources/azure-mgmt-resource/azure/mgmt/resource/resources/v2019_07_01/operations/_deployments_operations.py b/sdk/resources/azure-mgmt-resource/azure/mgmt/resource/resources/v2019_07_01/operations/_deployments_operations.py
index 12fd66d58794..d8d055ac362c 100644
--- a/sdk/resources/azure-mgmt-resource/azure/mgmt/resource/resources/v2019_07_01/operations/_deployments_operations.py
+++ b/sdk/resources/azure-mgmt-resource/azure/mgmt/resource/resources/v2019_07_01/operations/_deployments_operations.py
@@ -143,8 +143,8 @@ def check_existence_at_scope(
          deserialized response
         :param operation_config: :ref:`Operation configuration
          overrides<msrest:optionsforoperations>`.
-        :return: None or ClientRawResponse if raw=true
-        :rtype: None or ~msrest.pipeline.ClientRawResponse
+        :return: bool or ClientRawResponse if raw=true
+        :rtype: bool or ~msrest.pipeline.ClientRawResponse
         :raises: :class:`CloudError<msrestazure.azure_exceptions.CloudError>`
         """
         # Construct URL
@@ -172,14 +172,16 @@ def check_existence_at_scope(
         request = self._client.head(url, query_parameters, header_parameters)
         response = self._client.send(request, stream=False, **operation_config)
 
-        if response.status_code not in [204]:
+        if response.status_code not in [204, 404]:
             exp = CloudError(response)
             exp.request_id = response.headers.get('x-ms-request-id')
             raise exp
 
+        deserialized = (response.status_code == 204)
         if raw:
-            client_raw_response = ClientRawResponse(None, response)
+            client_raw_response = ClientRawResponse(deserialized, response)
             return client_raw_response
+        return deserialized
     check_existence_at_scope.metadata = {'url': '/{scope}/providers/Microsoft.Resources/deployments/{deploymentName}'}
 
 
@@ -719,8 +721,8 @@ def check_existence_at_tenant_scope(
          deserialized response
         :param operation_config: :ref:`Operation configuration
          overrides<msrest:optionsforoperations>`.
-        :return: None or ClientRawResponse if raw=true
-        :rtype: None or ~msrest.pipeline.ClientRawResponse
+        :return: bool or ClientRawResponse if raw=true
+        :rtype: bool or ~msrest.pipeline.ClientRawResponse
         :raises: :class:`CloudError<msrestazure.azure_exceptions.CloudError>`
         """
         # Construct URL
@@ -747,14 +749,16 @@ def check_existence_at_tenant_scope(
         request = self._client.head(url, query_parameters, header_parameters)
         response = self._client.send(request, stream=False, **operation_config)
 
-        if response.status_code not in [204]:
+        if response.status_code not in [204, 404]:
             exp = CloudError(response)
             exp.request_id = response.headers.get('x-ms-request-id')
             raise exp
 
+        deserialized = (response.status_code == 204)
         if raw:
-            client_raw_response = ClientRawResponse(None, response)
+            client_raw_response = ClientRawResponse(deserialized, response)
             return client_raw_response
+        return deserialized
     check_existence_at_tenant_scope.metadata = {'url': '/providers/Microsoft.Resources/deployments/{deploymentName}'}
 
 
@@ -1278,8 +1282,8 @@ def check_existence_at_management_group_scope(
          deserialized response
         :param operation_config: :ref:`Operation configuration
          overrides<msrest:optionsforoperations>`.
-        :return: None or ClientRawResponse if raw=true
-        :rtype: None or ~msrest.pipeline.ClientRawResponse
+        :return: bool or ClientRawResponse if raw=true
+        :rtype: bool or ~msrest.pipeline.ClientRawResponse
         :raises: :class:`CloudError<msrestazure.azure_exceptions.CloudError>`
         """
         # Construct URL
@@ -1307,14 +1311,16 @@ def check_existence_at_management_group_scope(
         request = self._client.head(url, query_parameters, header_parameters)
         response = self._client.send(request, stream=False, **operation_config)
 
-        if response.status_code not in [204]:
+        if response.status_code not in [204, 404]:
             exp = CloudError(response)
             exp.request_id = response.headers.get('x-ms-request-id')
             raise exp
 
+        deserialized = (response.status_code == 204)
         if raw:
-            client_raw_response = ClientRawResponse(None, response)
+            client_raw_response = ClientRawResponse(deserialized, response)
             return client_raw_response
+        return deserialized
     check_existence_at_management_group_scope.metadata = {'url': '/providers/Microsoft.Management/managementGroups/{groupId}/providers/Microsoft.Resources/deployments/{deploymentName}'}
 
 
@@ -1855,8 +1861,8 @@ def check_existence_at_subscription_scope(
          deserialized response
         :param operation_config: :ref:`Operation configuration
          overrides<msrest:optionsforoperations>`.
-        :return: None or ClientRawResponse if raw=true
-        :rtype: None or ~msrest.pipeline.ClientRawResponse
+        :return: bool or ClientRawResponse if raw=true
+        :rtype: bool or ~msrest.pipeline.ClientRawResponse
         :raises: :class:`CloudError<msrestazure.azure_exceptions.CloudError>`
         """
         # Construct URL
@@ -1884,14 +1890,16 @@ def check_existence_at_subscription_scope(
         request = self._client.head(url, query_parameters, header_parameters)
         response = self._client.send(request, stream=False, **operation_config)
 
-        if response.status_code not in [204]:
+        if response.status_code not in [204, 404]:
             exp = CloudError(response)
             exp.request_id = response.headers.get('x-ms-request-id')
             raise exp
 
+        deserialized = (response.status_code == 204)
         if raw:
-            client_raw_response = ClientRawResponse(None, response)
+            client_raw_response = ClientRawResponse(deserialized, response)
             return client_raw_response
+        return deserialized
     check_existence_at_subscription_scope.metadata = {'url': '/subscriptions/{subscriptionId}/providers/Microsoft.Resources/deployments/{deploymentName}'}
 
 
@@ -2428,8 +2436,8 @@ def check_existence(
          deserialized response
         :param operation_config: :ref:`Operation configuration
          overrides<msrest:optionsforoperations>`.
-        :return: None or ClientRawResponse if raw=true
-        :rtype: None or ~msrest.pipeline.ClientRawResponse
+        :return: bool or ClientRawResponse if raw=true
+        :rtype: bool or ~msrest.pipeline.ClientRawResponse
         :raises: :class:`CloudError<msrestazure.azure_exceptions.CloudError>`
         """
         # Construct URL
@@ -2458,14 +2466,16 @@ def check_existence(
         request = self._client.head(url, query_parameters, header_parameters)
         response = self._client.send(request, stream=False, **operation_config)
 
-        if response.status_code not in [204]:
+        if response.status_code not in [204, 404]:
             exp = CloudError(response)
             exp.request_id = response.headers.get('x-ms-request-id')
             raise exp
 
+        deserialized = (response.status_code == 204)
         if raw:
-            client_raw_response = ClientRawResponse(None, response)
+            client_raw_response = ClientRawResponse(deserialized, response)
             return client_raw_response
+        return deserialized
     check_existence.metadata = {'url': '/subscriptions/{subscriptionId}/resourcegroups/{resourceGroupName}/providers/Microsoft.Resources/deployments/{deploymentName}'}
 
 
diff --git a/sdk/resources/azure-mgmt-resource/azure/mgmt/resource/resources/v2019_07_01/operations/_resource_groups_operations.py b/sdk/resources/azure-mgmt-resource/azure/mgmt/resource/resources/v2019_07_01/operations/_resource_groups_operations.py
index e4901fa94e8a..c84f55a2f5d7 100644
--- a/sdk/resources/azure-mgmt-resource/azure/mgmt/resource/resources/v2019_07_01/operations/_resource_groups_operations.py
+++ b/sdk/resources/azure-mgmt-resource/azure/mgmt/resource/resources/v2019_07_01/operations/_resource_groups_operations.py
@@ -53,8 +53,8 @@ def check_existence(
          deserialized response
         :param operation_config: :ref:`Operation configuration
          overrides<msrest:optionsforoperations>`.
-        :return: None or ClientRawResponse if raw=true
-        :rtype: None or ~msrest.pipeline.ClientRawResponse
+        :return: bool or ClientRawResponse if raw=true
+        :rtype: bool or ~msrest.pipeline.ClientRawResponse
         :raises: :class:`CloudError<msrestazure.azure_exceptions.CloudError>`
         """
         # Construct URL
@@ -82,14 +82,16 @@ def check_existence(
         request = self._client.head(url, query_parameters, header_parameters)
         response = self._client.send(request, stream=False, **operation_config)
 
-        if response.status_code not in [204]:
+        if response.status_code not in [204, 404]:
             exp = CloudError(response)
             exp.request_id = response.headers.get('x-ms-request-id')
             raise exp
 
+        deserialized = (response.status_code == 204)
         if raw:
-            client_raw_response = ClientRawResponse(None, response)
+            client_raw_response = ClientRawResponse(deserialized, response)
             return client_raw_response
+        return deserialized
     check_existence.metadata = {'url': '/subscriptions/{subscriptionId}/resourcegroups/{resourceGroupName}'}
 
     def create_or_update(
diff --git a/sdk/resources/azure-mgmt-resource/azure/mgmt/resource/resources/v2019_07_01/operations/_resources_operations.py b/sdk/resources/azure-mgmt-resource/azure/mgmt/resource/resources/v2019_07_01/operations/_resources_operations.py
index 608c53086032..693da52a5f35 100644
--- a/sdk/resources/azure-mgmt-resource/azure/mgmt/resource/resources/v2019_07_01/operations/_resources_operations.py
+++ b/sdk/resources/azure-mgmt-resource/azure/mgmt/resource/resources/v2019_07_01/operations/_resources_operations.py
@@ -456,8 +456,8 @@ def check_existence(
          deserialized response
         :param operation_config: :ref:`Operation configuration
          overrides<msrest:optionsforoperations>`.
-        :return: None or ClientRawResponse if raw=true
-        :rtype: None or ~msrest.pipeline.ClientRawResponse
+        :return: bool or ClientRawResponse if raw=true
+        :rtype: bool or ~msrest.pipeline.ClientRawResponse
         :raises: :class:`CloudError<msrestazure.azure_exceptions.CloudError>`
         """
         # Construct URL
@@ -489,14 +489,16 @@ def check_existence(
         request = self._client.head(url, query_parameters, header_parameters)
         response = self._client.send(request, stream=False, **operation_config)
 
-        if response.status_code not in [204]:
+        if response.status_code not in [204, 404]:
             exp = CloudError(response)
             exp.request_id = response.headers.get('x-ms-request-id')
             raise exp
 
+        deserialized = (response.status_code == 204)
         if raw:
-            client_raw_response = ClientRawResponse(None, response)
+            client_raw_response = ClientRawResponse(deserialized, response)
             return client_raw_response
+        return deserialized
     check_existence.metadata = {'url': '/subscriptions/{subscriptionId}/resourcegroups/{resourceGroupName}/providers/{resourceProviderNamespace}/{parentResourcePath}/{resourceType}/{resourceName}'}
 
 
@@ -923,8 +925,8 @@ def check_existence_by_id(
          deserialized response
         :param operation_config: :ref:`Operation configuration
          overrides<msrest:optionsforoperations>`.
-        :return: None or ClientRawResponse if raw=true
-        :rtype: None or ~msrest.pipeline.ClientRawResponse
+        :return: bool or ClientRawResponse if raw=true
+        :rtype: bool or ~msrest.pipeline.ClientRawResponse
         :raises: :class:`CloudError<msrestazure.azure_exceptions.CloudError>`
         """
         # Construct URL
@@ -951,14 +953,16 @@ def check_existence_by_id(
         request = self._client.head(url, query_parameters, header_parameters)
         response = self._client.send(request, stream=False, **operation_config)
 
-        if response.status_code not in [204]:
+        if response.status_code not in [204, 404]:
             exp = CloudError(response)
             exp.request_id = response.headers.get('x-ms-request-id')
             raise exp
 
+        deserialized = (response.status_code == 204)
         if raw:
-            client_raw_response = ClientRawResponse(None, response)
+            client_raw_response = ClientRawResponse(deserialized, response)
             return client_raw_response
+        return deserialized
     check_existence_by_id.metadata = {'url': '/{resourceId}'}