diff --git a/azurerm/resource_arm_subnet.go b/azurerm/resource_arm_subnet.go
index f352eea7af8a..84e8eb2746d8 100644
--- a/azurerm/resource_arm_subnet.go
+++ b/azurerm/resource_arm_subnet.go
@@ -106,12 +106,14 @@ func resourceArmSubnet() *schema.Resource {
 											"Microsoft.Batch/batchAccounts",
 											"Microsoft.ContainerInstance/containerGroups",
 											"Microsoft.Databricks/workspaces",
+											"Microsoft.DBforPostgreSQL/serversv2",
 											"Microsoft.HardwareSecurityModules/dedicatedHSMs",
 											"Microsoft.Logic/integrationServiceEnvironments",
 											"Microsoft.Netapp/volumes",
 											"Microsoft.ServiceFabricMesh/networks",
 											"Microsoft.Sql/managedInstances",
 											"Microsoft.Sql/servers",
+											"Microsoft.StreamAnalytics/streamingJobs",
 											"Microsoft.Web/hostingEnvironments",
 											"Microsoft.Web/serverFarms",
 										}, false),
@@ -122,9 +124,11 @@ func resourceArmSubnet() *schema.Resource {
 										Elem: &schema.Schema{
 											Type: schema.TypeString,
 											ValidateFunc: validation.StringInSlice([]string{
+												"Microsoft.Network/networkinterfaces/*",
 												"Microsoft.Network/virtualNetworks/subnets/action",
 												"Microsoft.Network/virtualNetworks/subnets/join/action",
 												"Microsoft.Network/virtualNetworks/subnets/prepareNetworkPolicies/action",
+												"Microsoft.Network/virtualNetworks/subnets/unprepareNetworkPolicies/action",
 											}, false),
 										},
 									},
diff --git a/website/docs/r/subnet.html.markdown b/website/docs/r/subnet.html.markdown
index 867fd05b0674..fde57267db04 100644
--- a/website/docs/r/subnet.html.markdown
+++ b/website/docs/r/subnet.html.markdown
@@ -83,11 +83,11 @@ A `delegation` block supports the following:
 
 A `service_delegation` block supports the following:
 
--> **NOTE:** Delegating to services may not be available in all regions. Check that the service you are delegating to is available in your region using the [Azure CLI](https://docs.microsoft.com/en-us/cli/azure/network/vnet/subnet?view=azure-cli-latest#az-network-vnet-subnet-list-available-delegations)
+-> **NOTE:** Delegating to services may not be available in all regions. Check that the service you are delegating to is available in your region using the [Azure CLI](https://docs.microsoft.com/en-us/cli/azure/network/vnet/subnet?view=azure-cli-latest#az-network-vnet-subnet-list-available-delegations). Also, `actions` is specific to each service type. The exact list of `actions` needs to be retrieved using the aforementioned [Azure CLI](https://docs.microsoft.com/en-us/cli/azure/network/vnet/subnet?view=azure-cli-latest#az-network-vnet-subnet-list-available-delegations).
 
-* `name` - (Required) The name of service to delegate to. Possible values include `Microsoft.BareMetal/AzureVMware`, `Microsoft.BareMetal/CrayServers`, `Microsoft.Batch/batchAccounts`, `Microsoft.ContainerInstance/containerGroups`, `Microsoft.Databricks/workspaces`, `Microsoft.HardwareSecurityModules/dedicatedHSMs`, `Microsoft.Logic/integrationServiceEnvironments`, `Microsoft.Netapp/volumes`, `Microsoft.ServiceFabricMesh/networks`, `Microsoft.Sql/managedInstances`, `Microsoft.Sql/servers`, `Microsoft.Web/hostingEnvironments` and `Microsoft.Web/serverFarms`.
+* `name` - (Required) The name of service to delegate to. Possible values include `Microsoft.BareMetal/AzureVMware`, `Microsoft.BareMetal/CrayServers`, `Microsoft.Batch/batchAccounts`, `Microsoft.ContainerInstance/containerGroups`, `Microsoft.Databricks/workspaces`, `Microsoft.DBforPostgreSQL/serversv2`, `Microsoft.HardwareSecurityModules/dedicatedHSMs`, `Microsoft.Logic/integrationServiceEnvironments`, `Microsoft.Netapp/volumes`, `Microsoft.ServiceFabricMesh/networks`, `Microsoft.Sql/managedInstances`, `Microsoft.Sql/servers`, `Microsoft.StreamAnalytics/streamingJobs`, `Microsoft.Web/hostingEnvironments` and `Microsoft.Web/serverFarms`.
 
-* `actions` - (Optional) A list of Actions which should be delegated. Possible values include `Microsoft.Network/virtualNetworks/subnets/prepareNetworkPolicies/action`, `Microsoft.Network/virtualNetworks/subnets/action` and `Microsoft.Network/virtualNetworks/subnets/join/action`.
+* `actions` - (Optional) A list of Actions which should be delegated. This list is specific to the service to delegate to. Possible values include `Microsoft.Network/networkinterfaces/*`, `Microsoft.Network/virtualNetworks/subnets/action`, `Microsoft.Network/virtualNetworks/subnets/join/action`, `Microsoft.Network/virtualNetworks/subnets/prepareNetworkPolicies/action` and `Microsoft.Network/virtualNetworks/subnets/unprepareNetworkPolicies/action`.
 
 ## Attributes Reference