diff --git a/azure-mgmt-network/azure/mgmt/network/v2019_02_01/models/get_vpn_sites_configuration_request.py b/azure-mgmt-network/azure/mgmt/network/v2019_02_01/models/get_vpn_sites_configuration_request.py
index 7c8732192d6d..b5af3445226f 100644
--- a/azure-mgmt-network/azure/mgmt/network/v2019_02_01/models/get_vpn_sites_configuration_request.py
+++ b/azure-mgmt-network/azure/mgmt/network/v2019_02_01/models/get_vpn_sites_configuration_request.py
@@ -15,14 +15,20 @@
 class GetVpnSitesConfigurationRequest(Model):
     """List of Vpn-Sites.
 
+    All required parameters must be populated in order to send to Azure.
+
     :param vpn_sites: List of resource-ids of the vpn-sites for which config
      is to be downloaded.
     :type vpn_sites: list[str]
-    :param output_blob_sas_url: The sas-url to download the configurations for
-     vpn-sites
+    :param output_blob_sas_url: Required. The sas-url to download the
+     configurations for vpn-sites
     :type output_blob_sas_url: str
     """
 
+    _validation = {
+        'output_blob_sas_url': {'required': True},
+    }
+
     _attribute_map = {
         'vpn_sites': {'key': 'vpnSites', 'type': '[str]'},
         'output_blob_sas_url': {'key': 'outputBlobSasUrl', 'type': 'str'},
diff --git a/azure-mgmt-network/azure/mgmt/network/v2019_02_01/models/get_vpn_sites_configuration_request_py3.py b/azure-mgmt-network/azure/mgmt/network/v2019_02_01/models/get_vpn_sites_configuration_request_py3.py
index f15efad67f06..1719bc446036 100644
--- a/azure-mgmt-network/azure/mgmt/network/v2019_02_01/models/get_vpn_sites_configuration_request_py3.py
+++ b/azure-mgmt-network/azure/mgmt/network/v2019_02_01/models/get_vpn_sites_configuration_request_py3.py
@@ -15,20 +15,26 @@
 class GetVpnSitesConfigurationRequest(Model):
     """List of Vpn-Sites.
 
+    All required parameters must be populated in order to send to Azure.
+
     :param vpn_sites: List of resource-ids of the vpn-sites for which config
      is to be downloaded.
     :type vpn_sites: list[str]
-    :param output_blob_sas_url: The sas-url to download the configurations for
-     vpn-sites
+    :param output_blob_sas_url: Required. The sas-url to download the
+     configurations for vpn-sites
     :type output_blob_sas_url: str
     """
 
+    _validation = {
+        'output_blob_sas_url': {'required': True},
+    }
+
     _attribute_map = {
         'vpn_sites': {'key': 'vpnSites', 'type': '[str]'},
         'output_blob_sas_url': {'key': 'outputBlobSasUrl', 'type': 'str'},
     }
 
-    def __init__(self, *, vpn_sites=None, output_blob_sas_url: str=None, **kwargs) -> None:
+    def __init__(self, *, output_blob_sas_url: str, vpn_sites=None, **kwargs) -> None:
         super(GetVpnSitesConfigurationRequest, self).__init__(**kwargs)
         self.vpn_sites = vpn_sites
         self.output_blob_sas_url = output_blob_sas_url
diff --git a/azure-mgmt-network/azure/mgmt/network/v2019_02_01/operations/vpn_sites_configuration_operations.py b/azure-mgmt-network/azure/mgmt/network/v2019_02_01/operations/vpn_sites_configuration_operations.py
index 0a179465effc..512b613a21aa 100644
--- a/azure-mgmt-network/azure/mgmt/network/v2019_02_01/operations/vpn_sites_configuration_operations.py
+++ b/azure-mgmt-network/azure/mgmt/network/v2019_02_01/operations/vpn_sites_configuration_operations.py
@@ -40,7 +40,7 @@ def __init__(self, client, config, serializer, deserializer):
 
 
     def _download_initial(
-            self, resource_group_name, virtual_wan_name, vpn_sites=None, output_blob_sas_url=None, custom_headers=None, raw=False, **operation_config):
+            self, resource_group_name, virtual_wan_name, output_blob_sas_url, vpn_sites=None, custom_headers=None, raw=False, **operation_config):
         request = models.GetVpnSitesConfigurationRequest(vpn_sites=vpn_sites, output_blob_sas_url=output_blob_sas_url)
 
         # Construct URL
@@ -81,7 +81,7 @@ def _download_initial(
             return client_raw_response
 
     def download(
-            self, resource_group_name, virtual_wan_name, vpn_sites=None, output_blob_sas_url=None, custom_headers=None, raw=False, polling=True, **operation_config):
+            self, resource_group_name, virtual_wan_name, output_blob_sas_url, vpn_sites=None, custom_headers=None, raw=False, polling=True, **operation_config):
         """Gives the sas-url to download the configurations for vpn-sites in a
         resource group.
 
@@ -90,12 +90,12 @@ def download(
         :param virtual_wan_name: The name of the VirtualWAN for which
          configuration of all vpn-sites is needed.
         :type virtual_wan_name: str
-        :param vpn_sites: List of resource-ids of the vpn-sites for which
-         config is to be downloaded.
-        :type vpn_sites: list[str]
         :param output_blob_sas_url: The sas-url to download the configurations
          for vpn-sites
         :type output_blob_sas_url: str
+        :param vpn_sites: List of resource-ids of the vpn-sites for which
+         config is to be downloaded.
+        :type vpn_sites: list[str]
         :param dict custom_headers: headers that will be added to the request
         :param bool raw: The poller return type is ClientRawResponse, the
          direct response alongside the deserialized response
@@ -111,8 +111,8 @@ def download(
         raw_result = self._download_initial(
             resource_group_name=resource_group_name,
             virtual_wan_name=virtual_wan_name,
-            vpn_sites=vpn_sites,
             output_blob_sas_url=output_blob_sas_url,
+            vpn_sites=vpn_sites,
             custom_headers=custom_headers,
             raw=True,
             **operation_config