diff --git a/src/containerapp/azext_containerapp/_utils.py b/src/containerapp/azext_containerapp/_utils.py
index d0c5c996650..0ed9d21bf43 100644
--- a/src/containerapp/azext_containerapp/_utils.py
+++ b/src/containerapp/azext_containerapp/_utils.py
@@ -23,15 +23,18 @@ def _get_location_from_resource_group(cli_ctx, resource_group_name):
     return group.location
 
 
-def _validate_subscription_registered(cmd, resource_provider):
+def _validate_subscription_registered(cmd, resource_provider, subscription_id=None):
     providers_client = None
+    if not subscription_id:
+        subscription_id = get_subscription_id(cmd.cli_ctx)
+
     try:
-        providers_client = providers_client_factory(cmd.cli_ctx, get_subscription_id(cmd.cli_ctx))
+        providers_client = providers_client_factory(cmd.cli_ctx, subscription_id)
         registration_state = getattr(providers_client.get(resource_provider), 'registration_state', "NotRegistered")
 
         if not (registration_state and registration_state.lower() == 'registered'):
-            raise ValidationError('Subscription is not registered for the {} resource provider. Please run \"az provider register -n {} --wait\" to register your subscription.'.format(
-                resource_provider, resource_provider))
+            raise ValidationError('Subscription {} is not registered for the {} resource provider. Please run \"az provider register -n {} --wait\" to register your subscription.'.format(
+                subscription_id, resource_provider, resource_provider))
     except ValidationError as ex:
         raise ex
     except Exception:
diff --git a/src/containerapp/azext_containerapp/custom.py b/src/containerapp/azext_containerapp/custom.py
index 005bb52d9af..3ef91290a5f 100644
--- a/src/containerapp/azext_containerapp/custom.py
+++ b/src/containerapp/azext_containerapp/custom.py
@@ -783,7 +783,12 @@ def create_managed_environment(cmd,
 
     # Microsoft.ContainerService RP registration is required for vnet enabled environments
     if infrastructure_subnet_resource_id is not None or app_subnet_resource_id is not None:
-        _validate_subscription_registered(cmd, "Microsoft.ContainerService")
+        if (is_valid_resource_id(app_subnet_resource_id)):
+            parsed_app_subnet_resource_id = parse_resource_id(app_subnet_resource_id)
+            subnet_subscription = parsed_app_subnet_resource_id["subscription"]
+            _validate_subscription_registered(cmd, "Microsoft.ContainerService", subnet_subscription)
+        else:
+            raise ValidationError('Subnet resource ID is invalid.')
 
     if logs_customer_id is None or logs_key is None:
         logs_customer_id, logs_key = _generate_log_analytics_if_not_provided(cmd, logs_customer_id, logs_key, location, resource_group_name)