Add forward_to property to servicebus subscription resource

azurerm/resource_arm_servicebus_subscription.go

@@ -82,6 +82,12 @@ func resourceArmServiceBusSubscription() *schema.Resource {
 				ForceNew: true,
 			},
 
+			"forward_to": {
+				Type:        schema.TypeString,
+				Optional:    true,
+				Description: "The name of a Queue or Topic to automatically forward messages to.",
+			},
+
 			// TODO: remove in the next major version
 			"dead_lettering_on_filter_evaluation_exceptions": {
 				Type:       schema.TypeBool,
@@ -124,6 +130,10 @@ func resourceArmServiceBusSubscriptionCreate(d *schema.ResourceData, meta interf
 		parameters.SBSubscriptionProperties.LockDuration = &lockDuration
 	}
 
+	if forwardTo := d.Get("forward_to").(string); forwardTo != "" {
+		parameters.SBSubscriptionProperties.ForwardTo = &forwardTo
+	}
+
 	_, err := client.CreateOrUpdate(ctx, resourceGroup, namespaceName, topicName, name, parameters)
 	if err != nil {
 		return err
@@ -176,6 +186,7 @@ func resourceArmServiceBusSubscriptionRead(d *schema.ResourceData, meta interfac
 		d.Set("dead_lettering_on_message_expiration", props.DeadLetteringOnMessageExpiration)
 		d.Set("enable_batched_operations", props.EnableBatchedOperations)
 		d.Set("requires_session", props.RequiresSession)
+		d.Set("forward_to", props.ForwardTo)
 
 		if count := props.MaxDeliveryCount; count != nil {
 			d.Set("max_delivery_count", int(*count))

azurerm/resource_arm_servicebus_subscription_test.go

@@ -173,9 +173,18 @@ resource "azurerm_servicebus_subscription" "test" {
     namespace_name = "${azurerm_servicebus_namespace.test.name}"
     topic_name = "${azurerm_servicebus_topic.test.name}"
     resource_group_name = "${azurerm_resource_group.test.name}"
+    forward_to = "${azurerm_servicebus_topic.forward_to.name}"
     max_delivery_count = 10
 }
-`, rInt, location, rInt, rInt, rInt)
+
+resource "azurerm_servicebus_topic" "forward_to" {
+    name = "acctestservicebustopic-forward_to-%d"
+    namespace_name = "${azurerm_servicebus_namespace.test.name}"
+    resource_group_name = "${azurerm_resource_group.test.name}"
+}
+
+
+`, rInt, location, rInt, rInt, rInt, rInt)
 }
 
 func testAccAzureRMServiceBusSubscription_update(rInt int, location string) string {

examples/servicebus-create-topic-and-subscription/main.tf

@@ -18,9 +18,9 @@ resource "azurerm_servicebus_namespace" "test" {
   sku                 = "standard"
 }
 
+
 resource "azurerm_servicebus_topic" "test" {
   name                = "${var.unique}Topic"
-  location            = "${var.location}"
   resource_group_name = "${var.resource_group}"
   namespace_name      = "${azurerm_servicebus_namespace.test.name}"
 
@@ -29,9 +29,18 @@ resource "azurerm_servicebus_topic" "test" {
 
 resource "azurerm_servicebus_subscription" "test" {
   name                = "${var.unique}Subscription"
-  location            = "${var.location}"
   resource_group_name = "${var.resource_group}"
   namespace_name      = "${azurerm_servicebus_namespace.test.name}"
   topic_name          = "${azurerm_servicebus_topic.test.name}"
+  forward_to          = "${azurerm_servicebus_topic.forward_to.name}"
   max_delivery_count  = 1
 }
+
+
+resource "azurerm_servicebus_topic" "forward_to" {
+  name                = "${var.unique}Topic-forward_to"
+  resource_group_name = "${var.resource_group}"
+  namespace_name      = "${azurerm_servicebus_namespace.test.name}"
+
+  enable_partitioning = true
+}

examples/servicebus-create-topic-and-subscription/variables.tf

@@ -8,5 +8,5 @@ variable "location" {
 }
 
 variable "unique" {
-  description = "a unique string that will be used to comprise the names of the Service Bus, Topic, and Subscription name spaces"
+  description = "A unique string that will be used to comprise the names of the Service Bus, Topic, and Subscription name spaces"
 }

website/docs/r/servicebus_subscription.html.markdown

@@ -98,6 +98,9 @@ The following arguments are supported:
     supports the concept of a session. Defaults to false. Changing this forces a
     new resource to be created.
 
+* `forward_to` - (Optional) The name of a Queue or Topic to automatically forward 
+    messages to. Defaults to none.
+
 ### TimeSpan Format
 
 Some arguments for this resource are required in the TimeSpan format which is