diff --git a/sdk/azurestack/azure-mgmt-azurestack/_meta.json b/sdk/azurestack/azure-mgmt-azurestack/_meta.json
index 231a159efafd..26d0809b6085 100644
--- a/sdk/azurestack/azure-mgmt-azurestack/_meta.json
+++ b/sdk/azurestack/azure-mgmt-azurestack/_meta.json
@@ -1,8 +1,11 @@
 {
-  "autorest": "3.0.6369",
-  "use": "@autorest/python@5.6.2",
-  "commit": "ea6ceada9e22eb0d455288d339955dfe56521302",
+  "autorest": "3.4.5",
+  "use": [
+    "@autorest/python@5.8.4",
+    "@autorest/modelerfour@4.19.2"
+  ],
+  "commit": "754938e4cb9416358b02dcc11f444adf14b3b7b6",
   "repository_url": "https://github.com/Azure/azure-rest-api-specs",
-  "autorest_command": "autorest specification/azurestack/resource-manager/readme.md --multiapi --python --python-mode=update --python-sdks-folder=/home/vsts/work/1/s/azure-sdk-for-python/sdk --track2 --use=@autorest/python@5.6.2 --version=3.0.6369",
+  "autorest_command": "autorest specification/azurestack/resource-manager/readme.md --multiapi --python --python-mode=update --python-sdks-folder=/home/vsts/work/1/s/azure-sdk-for-python/sdk --track2 --use=@autorest/python@5.8.4 --use=@autorest/modelerfour@4.19.2 --version=3.4.5",
   "readme": "specification/azurestack/resource-manager/readme.md"
 }
\ No newline at end of file
diff --git a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/_azure_stack_management_client.py b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/_azure_stack_management_client.py
index f25c3bfa7b04..d8a0d262468d 100644
--- a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/_azure_stack_management_client.py
+++ b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/_azure_stack_management_client.py
@@ -16,6 +16,7 @@
     from typing import Any, Optional
 
     from azure.core.credentials import TokenCredential
+    from azure.core.pipeline.transport import HttpRequest, HttpResponse
 
 from ._configuration import AzureStackManagementClientConfiguration
 from .operations import Operations
@@ -80,6 +81,24 @@ def __init__(
         self.linked_subscriptions = LinkedSubscriptionsOperations(
             self._client, self._config, self._serialize, self._deserialize)
 
+    def _send_request(self, http_request, **kwargs):
+        # type: (HttpRequest, Any) -> HttpResponse
+        """Runs the network request through the client's chained policies.
+
+        :param http_request: The network request you want to make. Required.
+        :type http_request: ~azure.core.pipeline.transport.HttpRequest
+        :keyword bool stream: Whether the response payload will be streamed. Defaults to True.
+        :return: The response of your network call. Does not do error handling on your response.
+        :rtype: ~azure.core.pipeline.transport.HttpResponse
+        """
+        path_format_arguments = {
+            'subscriptionId': self._serialize.url("self._config.subscription_id", self._config.subscription_id, 'str'),
+        }
+        http_request.url = self._client.format_url(http_request.url, **path_format_arguments)
+        stream = kwargs.pop("stream", True)
+        pipeline_response = self._client._pipeline.run(http_request, stream=stream, **kwargs)
+        return pipeline_response.http_response
+
     def close(self):
         # type: () -> None
         self._client.close()
diff --git a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/_metadata.json b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/_metadata.json
index 33c346444236..da7db1450dfb 100644
--- a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/_metadata.json
+++ b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/_metadata.json
@@ -10,8 +10,8 @@
         "azure_arm": true,
         "has_lro_operations": false,
         "client_side_validation": false,
-        "sync_imports": "{\"typing\": {\"azurecore\": {\"azure.core.credentials\": [\"TokenCredential\"]}}, \"regular\": {\"azurecore\": {\"azure.profiles\": [\"KnownProfiles\", \"ProfileDefinition\"], \"azure.profiles.multiapiclient\": [\"MultiApiClientMixin\"], \"msrest\": [\"Deserializer\", \"Serializer\"], \"azure.mgmt.core\": [\"ARMPipelineClient\"]}, \"local\": {\"._configuration\": [\"AzureStackManagementClientConfiguration\"]}}, \"conditional\": {\"stdlib\": {\"typing\": [\"Any\", \"Optional\"]}}}",
-        "async_imports": "{\"typing\": {\"azurecore\": {\"azure.core.credentials_async\": [\"AsyncTokenCredential\"]}}, \"regular\": {\"azurecore\": {\"azure.profiles\": [\"KnownProfiles\", \"ProfileDefinition\"], \"azure.profiles.multiapiclient\": [\"MultiApiClientMixin\"], \"msrest\": [\"Deserializer\", \"Serializer\"], \"azure.mgmt.core\": [\"AsyncARMPipelineClient\"]}, \"local\": {\"._configuration\": [\"AzureStackManagementClientConfiguration\"]}}, \"conditional\": {\"stdlib\": {\"typing\": [\"Any\", \"Optional\"]}}}"
+        "sync_imports": "{\"typing\": {\"azurecore\": {\"azure.core.credentials\": [\"TokenCredential\"]}}, \"regular\": {\"azurecore\": {\"azure.profiles\": [\"KnownProfiles\", \"ProfileDefinition\"], \"azure.profiles.multiapiclient\": [\"MultiApiClientMixin\"], \"msrest\": [\"Deserializer\", \"Serializer\"], \"azure.mgmt.core\": [\"ARMPipelineClient\"]}, \"local\": {\"._configuration\": [\"AzureStackManagementClientConfiguration\"]}}, \"conditional\": {\"stdlib\": {\"typing\": [\"Any\", \"Optional\"]}, \"azurecore\": {\"azure.core.pipeline.transport\": [\"HttpRequest\", \"HttpResponse\"]}}}",
+        "async_imports": "{\"typing\": {\"azurecore\": {\"azure.core.credentials_async\": [\"AsyncTokenCredential\"]}}, \"regular\": {\"azurecore\": {\"azure.profiles\": [\"KnownProfiles\", \"ProfileDefinition\"], \"azure.profiles.multiapiclient\": [\"MultiApiClientMixin\"], \"msrest\": [\"Deserializer\", \"Serializer\"], \"azure.mgmt.core\": [\"AsyncARMPipelineClient\"]}, \"local\": {\"._configuration\": [\"AzureStackManagementClientConfiguration\"]}}, \"conditional\": {\"stdlib\": {\"typing\": [\"Any\", \"Optional\"]}, \"azurecore\": {\"azure.core.pipeline.transport\": [\"AsyncHttpResponse\", \"HttpRequest\"]}}}"
     },
     "global_parameters": {
         "sync": {
@@ -104,11 +104,5 @@
         "products": "ProductsOperations",
         "registrations": "RegistrationsOperations",
         "linked_subscriptions": "LinkedSubscriptionsOperations"
-    },
-    "operation_mixins": {
-        "sync_imports": "None",
-        "async_imports": "None",
-        "operations": {
-        }
     }
 }
\ No newline at end of file
diff --git a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/_version.py b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/_version.py
index c47f66669f1b..e5754a47ce68 100644
--- a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/_version.py
+++ b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/_version.py
@@ -6,4 +6,4 @@
 # Changes may cause incorrect behavior and will be lost if the code is regenerated.
 # --------------------------------------------------------------------------
 
-VERSION = "1.0.0"
+VERSION = "1.0.0b1"
diff --git a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/_azure_stack_management_client.py b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/_azure_stack_management_client.py
index 91fc40d3bba6..522b349718cd 100644
--- a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/_azure_stack_management_client.py
+++ b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/_azure_stack_management_client.py
@@ -8,6 +8,7 @@
 
 from typing import Any, Optional, TYPE_CHECKING
 
+from azure.core.pipeline.transport import AsyncHttpResponse, HttpRequest
 from azure.mgmt.core import AsyncARMPipelineClient
 from msrest import Deserializer, Serializer
 
@@ -77,6 +78,23 @@ def __init__(
         self.linked_subscriptions = LinkedSubscriptionsOperations(
             self._client, self._config, self._serialize, self._deserialize)
 
+    async def _send_request(self, http_request: HttpRequest, **kwargs: Any) -> AsyncHttpResponse:
+        """Runs the network request through the client's chained policies.
+
+        :param http_request: The network request you want to make. Required.
+        :type http_request: ~azure.core.pipeline.transport.HttpRequest
+        :keyword bool stream: Whether the response payload will be streamed. Defaults to True.
+        :return: The response of your network call. Does not do error handling on your response.
+        :rtype: ~azure.core.pipeline.transport.AsyncHttpResponse
+        """
+        path_format_arguments = {
+            'subscriptionId': self._serialize.url("self._config.subscription_id", self._config.subscription_id, 'str'),
+        }
+        http_request.url = self._client.format_url(http_request.url, **path_format_arguments)
+        stream = kwargs.pop("stream", True)
+        pipeline_response = await self._client._pipeline.run(http_request, stream=stream, **kwargs)
+        return pipeline_response.http_response
+
     async def close(self) -> None:
         await self._client.close()
 
diff --git a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_cloud_manifest_file_operations.py b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_cloud_manifest_file_operations.py
index 337d3857a018..a5a435f4ba92 100644
--- a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_cloud_manifest_file_operations.py
+++ b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_cloud_manifest_file_operations.py
@@ -42,7 +42,7 @@ def __init__(self, client, config, serializer, deserializer) -> None:
 
     async def list(
         self,
-        **kwargs
+        **kwargs: Any
     ) -> "_models.CloudManifestFileResponse":
         """Returns a cloud specific manifest JSON file with latest version.
 
@@ -91,7 +91,7 @@ async def get(
         self,
         verification_version: str,
         version_creation_date: Optional[str] = None,
-        **kwargs
+        **kwargs: Any
     ) -> "_models.CloudManifestFileResponse":
         """Returns a cloud specific manifest JSON file.
 
diff --git a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_customer_subscriptions_operations.py b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_customer_subscriptions_operations.py
index 08c4a31c8caa..24f08536b100 100644
--- a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_customer_subscriptions_operations.py
+++ b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_customer_subscriptions_operations.py
@@ -45,7 +45,7 @@ def list(
         self,
         resource_group: str,
         registration_name: str,
-        **kwargs
+        **kwargs: Any
     ) -> AsyncIterable["_models.CustomerSubscriptionList"]:
         """Returns a list of products.
 
@@ -121,7 +121,7 @@ async def get(
         resource_group: str,
         registration_name: str,
         customer_subscription_name: str,
-        **kwargs
+        **kwargs: Any
     ) -> "_models.CustomerSubscription":
         """Returns the specified product.
 
@@ -184,7 +184,7 @@ async def delete(
         resource_group: str,
         registration_name: str,
         customer_subscription_name: str,
-        **kwargs
+        **kwargs: Any
     ) -> None:
         """Deletes a customer subscription under a registration.
 
@@ -245,7 +245,7 @@ async def create(
         registration_name: str,
         customer_subscription_name: str,
         customer_creation_parameters: "_models.CustomerSubscription",
-        **kwargs
+        **kwargs: Any
     ) -> "_models.CustomerSubscription":
         """Creates a new customer subscription under a registration.
 
diff --git a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_linked_subscriptions_operations.py b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_linked_subscriptions_operations.py
index 095d00e6062b..a4dd4a1891a7 100644
--- a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_linked_subscriptions_operations.py
+++ b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_linked_subscriptions_operations.py
@@ -44,7 +44,7 @@ def __init__(self, client, config, serializer, deserializer) -> None:
     def list_by_resource_group(
         self,
         resource_group: str,
-        **kwargs
+        **kwargs: Any
     ) -> AsyncIterable["_models.LinkedSubscriptionsList"]:
         """Returns a list of all linked subscriptions under current resource group.
 
@@ -114,7 +114,7 @@ async def get_next(next_link=None):
 
     def list_by_subscription(
         self,
-        **kwargs
+        **kwargs: Any
     ) -> AsyncIterable["_models.LinkedSubscriptionsList"]:
         """Returns a list of all linked subscriptions under current subscription.
 
@@ -183,7 +183,7 @@ async def get(
         self,
         resource_group: str,
         linked_subscription_name: str,
-        **kwargs
+        **kwargs: Any
     ) -> "_models.LinkedSubscription":
         """Returns the properties of a Linked Subscription resource.
 
@@ -242,7 +242,7 @@ async def delete(
         self,
         resource_group: str,
         linked_subscription_name: str,
-        **kwargs
+        **kwargs: Any
     ) -> None:
         """Delete the requested Linked Subscription resource.
 
@@ -299,7 +299,7 @@ async def create_or_update(
         resource_group: str,
         linked_subscription_name: str,
         resource: "_models.LinkedSubscriptionParameter",
-        **kwargs
+        **kwargs: Any
     ) -> "_models.LinkedSubscription":
         """Create or update a linked subscription resource.
 
@@ -370,7 +370,7 @@ async def update(
         resource_group: str,
         linked_subscription_name: str,
         resource: "_models.LinkedSubscriptionParameter",
-        **kwargs
+        **kwargs: Any
     ) -> "_models.LinkedSubscription":
         """Patch a Linked Subscription resource.
 
diff --git a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_operations.py b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_operations.py
index a098bc86b52d..5d5f96b8699f 100644
--- a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_operations.py
+++ b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_operations.py
@@ -43,7 +43,7 @@ def __init__(self, client, config, serializer, deserializer) -> None:
 
     def list(
         self,
-        **kwargs
+        **kwargs: Any
     ) -> AsyncIterable["_models.OperationList"]:
         """Returns the list of supported REST operations.
 
diff --git a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_products_operations.py b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_products_operations.py
index 027d75cf82d5..332ee419a988 100644
--- a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_products_operations.py
+++ b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_products_operations.py
@@ -45,7 +45,7 @@ def list(
         self,
         resource_group: str,
         registration_name: str,
-        **kwargs
+        **kwargs: Any
     ) -> AsyncIterable["_models.ProductList"]:
         """Returns a list of products.
 
@@ -121,7 +121,7 @@ async def get(
         resource_group: str,
         registration_name: str,
         product_name: str,
-        **kwargs
+        **kwargs: Any
     ) -> "_models.Product":
         """Returns the specified product.
 
@@ -184,7 +184,7 @@ async def list_details(
         resource_group: str,
         registration_name: str,
         product_name: str,
-        **kwargs
+        **kwargs: Any
     ) -> "_models.ExtendedProduct":
         """Returns the extended properties of a product.
 
@@ -248,7 +248,7 @@ async def get_products(
         registration_name: str,
         product_name: str,
         device_configuration: Optional["_models.DeviceConfiguration"] = None,
-        **kwargs
+        **kwargs: Any
     ) -> "_models.ProductList":
         """Returns a list of products.
 
@@ -322,7 +322,7 @@ async def get_product(
         registration_name: str,
         product_name: str,
         device_configuration: Optional["_models.DeviceConfiguration"] = None,
-        **kwargs
+        **kwargs: Any
     ) -> "_models.Product":
         """Returns the specified product.
 
@@ -396,7 +396,7 @@ async def upload_log(
         registration_name: str,
         product_name: str,
         marketplace_product_log_update: Optional["_models.MarketplaceProductLogUpdate"] = None,
-        **kwargs
+        **kwargs: Any
     ) -> "_models.ProductLog":
         """Returns the specified product.
 
diff --git a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_registrations_operations.py b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_registrations_operations.py
index 2f2131c73c71..d484d4defb0d 100644
--- a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_registrations_operations.py
+++ b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/aio/operations/_registrations_operations.py
@@ -44,7 +44,7 @@ def __init__(self, client, config, serializer, deserializer) -> None:
     def list(
         self,
         resource_group: str,
-        **kwargs
+        **kwargs: Any
     ) -> AsyncIterable["_models.RegistrationList"]:
         """Returns a list of all registrations.
 
@@ -112,11 +112,78 @@ async def get_next(next_link=None):
         )
     list.metadata = {'url': '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroup}/providers/Microsoft.AzureStack/registrations'}  # type: ignore
 
+    def list_by_subscription(
+        self,
+        **kwargs: Any
+    ) -> AsyncIterable["_models.RegistrationList"]:
+        """Returns a list of all registrations under current subscription.
+
+        :keyword callable cls: A custom type or function that will be passed the direct response
+        :return: An iterator like instance of either RegistrationList or the result of cls(response)
+        :rtype: ~azure.core.async_paging.AsyncItemPaged[~azure.mgmt.azurestack.models.RegistrationList]
+        :raises: ~azure.core.exceptions.HttpResponseError
+        """
+        cls = kwargs.pop('cls', None)  # type: ClsType["_models.RegistrationList"]
+        error_map = {
+            401: ClientAuthenticationError, 404: ResourceNotFoundError, 409: ResourceExistsError
+        }
+        error_map.update(kwargs.pop('error_map', {}))
+        api_version = "2020-06-01-preview"
+        accept = "application/json"
+
+        def prepare_request(next_link=None):
+            # Construct headers
+            header_parameters = {}  # type: Dict[str, Any]
+            header_parameters['Accept'] = self._serialize.header("accept", accept, 'str')
+
+            if not next_link:
+                # Construct URL
+                url = self.list_by_subscription.metadata['url']  # type: ignore
+                path_format_arguments = {
+                    'subscriptionId': self._serialize.url("self._config.subscription_id", self._config.subscription_id, 'str'),
+                }
+                url = self._client.format_url(url, **path_format_arguments)
+                # Construct parameters
+                query_parameters = {}  # type: Dict[str, Any]
+                query_parameters['api-version'] = self._serialize.query("api_version", api_version, 'str')
+
+                request = self._client.get(url, query_parameters, header_parameters)
+            else:
+                url = next_link
+                query_parameters = {}  # type: Dict[str, Any]
+                request = self._client.get(url, query_parameters, header_parameters)
+            return request
+
+        async def extract_data(pipeline_response):
+            deserialized = self._deserialize('RegistrationList', pipeline_response)
+            list_of_elem = deserialized.value
+            if cls:
+                list_of_elem = cls(list_of_elem)
+            return deserialized.next_link or None, AsyncList(list_of_elem)
+
+        async def get_next(next_link=None):
+            request = prepare_request(next_link)
+
+            pipeline_response = await self._client._pipeline.run(request, stream=False, **kwargs)
+            response = pipeline_response.http_response
+
+            if response.status_code not in [200]:
+                error = self._deserialize.failsafe_deserialize(_models.ErrorResponse, response)
+                map_error(status_code=response.status_code, response=response, error_map=error_map)
+                raise HttpResponseError(response=response, model=error, error_format=ARMErrorFormat)
+
+            return pipeline_response
+
+        return AsyncItemPaged(
+            get_next, extract_data
+        )
+    list_by_subscription.metadata = {'url': '/subscriptions/{subscriptionId}/providers/Microsoft.AzureStack/registrations'}  # type: ignore
+
     async def get(
         self,
         resource_group: str,
         registration_name: str,
-        **kwargs
+        **kwargs: Any
     ) -> "_models.Registration":
         """Returns the properties of an Azure Stack registration.
 
@@ -175,7 +242,7 @@ async def delete(
         self,
         resource_group: str,
         registration_name: str,
-        **kwargs
+        **kwargs: Any
     ) -> None:
         """Delete the requested Azure Stack registration.
 
@@ -232,7 +299,7 @@ async def create_or_update(
         resource_group: str,
         registration_name: str,
         token: "_models.RegistrationParameter",
-        **kwargs
+        **kwargs: Any
     ) -> "_models.Registration":
         """Create or update an Azure Stack registration.
 
@@ -303,7 +370,7 @@ async def update(
         resource_group: str,
         registration_name: str,
         token: "_models.RegistrationParameter",
-        **kwargs
+        **kwargs: Any
     ) -> "_models.Registration":
         """Patch an Azure Stack registration.
 
@@ -369,7 +436,7 @@ async def get_activation_key(
         self,
         resource_group: str,
         registration_name: str,
-        **kwargs
+        **kwargs: Any
     ) -> "_models.ActivationKeyResult":
         """Returns Azure Stack Activation Key.
 
@@ -428,7 +495,7 @@ async def enable_remote_management(
         self,
         resource_group: str,
         registration_name: str,
-        **kwargs
+        **kwargs: Any
     ) -> None:
         """Enables remote management for device under the Azure Stack registration.
 
diff --git a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/operations/_registrations_operations.py b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/operations/_registrations_operations.py
index 043eed7022ed..338cc44dbde1 100644
--- a/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/operations/_registrations_operations.py
+++ b/sdk/azurestack/azure-mgmt-azurestack/azure/mgmt/azurestack/operations/_registrations_operations.py
@@ -117,6 +117,74 @@ def get_next(next_link=None):
         )
     list.metadata = {'url': '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroup}/providers/Microsoft.AzureStack/registrations'}  # type: ignore
 
+    def list_by_subscription(
+        self,
+        **kwargs  # type: Any
+    ):
+        # type: (...) -> Iterable["_models.RegistrationList"]
+        """Returns a list of all registrations under current subscription.
+
+        :keyword callable cls: A custom type or function that will be passed the direct response
+        :return: An iterator like instance of either RegistrationList or the result of cls(response)
+        :rtype: ~azure.core.paging.ItemPaged[~azure.mgmt.azurestack.models.RegistrationList]
+        :raises: ~azure.core.exceptions.HttpResponseError
+        """
+        cls = kwargs.pop('cls', None)  # type: ClsType["_models.RegistrationList"]
+        error_map = {
+            401: ClientAuthenticationError, 404: ResourceNotFoundError, 409: ResourceExistsError
+        }
+        error_map.update(kwargs.pop('error_map', {}))
+        api_version = "2020-06-01-preview"
+        accept = "application/json"
+
+        def prepare_request(next_link=None):
+            # Construct headers
+            header_parameters = {}  # type: Dict[str, Any]
+            header_parameters['Accept'] = self._serialize.header("accept", accept, 'str')
+
+            if not next_link:
+                # Construct URL
+                url = self.list_by_subscription.metadata['url']  # type: ignore
+                path_format_arguments = {
+                    'subscriptionId': self._serialize.url("self._config.subscription_id", self._config.subscription_id, 'str'),
+                }
+                url = self._client.format_url(url, **path_format_arguments)
+                # Construct parameters
+                query_parameters = {}  # type: Dict[str, Any]
+                query_parameters['api-version'] = self._serialize.query("api_version", api_version, 'str')
+
+                request = self._client.get(url, query_parameters, header_parameters)
+            else:
+                url = next_link
+                query_parameters = {}  # type: Dict[str, Any]
+                request = self._client.get(url, query_parameters, header_parameters)
+            return request
+
+        def extract_data(pipeline_response):
+            deserialized = self._deserialize('RegistrationList', pipeline_response)
+            list_of_elem = deserialized.value
+            if cls:
+                list_of_elem = cls(list_of_elem)
+            return deserialized.next_link or None, iter(list_of_elem)
+
+        def get_next(next_link=None):
+            request = prepare_request(next_link)
+
+            pipeline_response = self._client._pipeline.run(request, stream=False, **kwargs)
+            response = pipeline_response.http_response
+
+            if response.status_code not in [200]:
+                error = self._deserialize.failsafe_deserialize(_models.ErrorResponse, response)
+                map_error(status_code=response.status_code, response=response, error_map=error_map)
+                raise HttpResponseError(response=response, model=error, error_format=ARMErrorFormat)
+
+            return pipeline_response
+
+        return ItemPaged(
+            get_next, extract_data
+        )
+    list_by_subscription.metadata = {'url': '/subscriptions/{subscriptionId}/providers/Microsoft.AzureStack/registrations'}  # type: ignore
+
     def get(
         self,
         resource_group,  # type: str