diff --git a/internal/services/appservice/helpers/function_app_schema.go b/internal/services/appservice/helpers/function_app_schema.go
index 8844f5a64dfb..848b1458b27f 100644
--- a/internal/services/appservice/helpers/function_app_schema.go
+++ b/internal/services/appservice/helpers/function_app_schema.go
@@ -1687,6 +1687,10 @@ func ExpandSiteConfigLinuxFunctionApp(siteConfig []SiteConfigLinuxFunctionApp, e
 		expanded.MinimumElasticInstanceCount = utils.Int32(int32(linuxSiteConfig.ElasticInstanceMinimum))
 	}
 
+	if metadata.ResourceData.HasChange("site_config.0.runtime_scale_monitoring_enabled") {
+		expanded.FunctionsRuntimeScaleMonitoringEnabled = utils.Bool(linuxSiteConfig.RuntimeScaleMonitoring)
+	}
+
 	expanded.AppSettings = &appSettings
 
 	return expanded, nil
@@ -1923,6 +1927,10 @@ func ExpandSiteConfigWindowsFunctionApp(siteConfig []SiteConfigWindowsFunctionAp
 		expanded.MinimumElasticInstanceCount = utils.Int32(int32(windowsSiteConfig.ElasticInstanceMinimum))
 	}
 
+	if metadata.ResourceData.HasChange("site_config.0.runtime_scale_monitoring_enabled") {
+		expanded.FunctionsRuntimeScaleMonitoringEnabled = utils.Bool(windowsSiteConfig.RuntimeScaleMonitoring)
+	}
+
 	expanded.AppSettings = &appSettings
 
 	return expanded, nil
diff --git a/internal/services/appservice/linux_function_app_resource_test.go b/internal/services/appservice/linux_function_app_resource_test.go
index 21ef36a6757a..312948a4ad52 100644
--- a/internal/services/appservice/linux_function_app_resource_test.go
+++ b/internal/services/appservice/linux_function_app_resource_test.go
@@ -42,6 +42,23 @@ func TestAccLinuxFunctionApp_basicBasicPlan(t *testing.T) {
 	})
 }
 
+func TestAccLinuxFunctionApp_basicRuntimeCheck(t *testing.T) {
+	data := acceptance.BuildTestData(t, "azurerm_linux_function_app", "test")
+	r := LinuxFunctionAppResource{}
+
+	data.ResourceTest(t, r, []acceptance.TestStep{
+		{
+			Config: r.runtimeScaleCheck(data, SkuElasticPremiumPlan),
+			Check: acceptance.ComposeTestCheckFunc(
+				check.That(data.ResourceName).ExistsInAzure(r),
+				check.That(data.ResourceName).Key("kind").HasValue("functionapp,linux"),
+				check.That(data.ResourceName).Key("site_config.0.runtime_scale_monitoring_enabled").HasValue("true"),
+			),
+		},
+		data.ImportStep(),
+	})
+}
+
 func TestAccLinuxFunctionApp_basicConsumptionPlan(t *testing.T) {
 	data := acceptance.BuildTestData(t, "azurerm_linux_function_app", "test")
 	r := LinuxFunctionAppResource{}
@@ -1362,6 +1379,31 @@ resource "azurerm_linux_function_app" "test" {
 `, r.template(data, planSku), data.RandomInteger)
 }
 
+func (r LinuxFunctionAppResource) runtimeScaleCheck(data acceptance.TestData, planSku string) string {
+	return fmt.Sprintf(`
+provider "azurerm" {
+  features {}
+}
+
+%s
+
+resource "azurerm_linux_function_app" "test" {
+  name                = "acctest-LFA-%d"
+  location            = azurerm_resource_group.test.location
+  resource_group_name = azurerm_resource_group.test.name
+  service_plan_id     = azurerm_service_plan.test.id
+
+  storage_account_name       = azurerm_storage_account.test.name
+  storage_account_access_key = azurerm_storage_account.test.primary_access_key
+
+  site_config {
+    runtime_scale_monitoring_enabled = true
+    pre_warmed_instance_count        = 1
+  }
+}
+`, r.template(data, planSku), data.RandomInteger)
+}
+
 func (r LinuxFunctionAppResource) healthCheckPath(data acceptance.TestData, planSku string) string {
 	return fmt.Sprintf(`
 provider "azurerm" {
diff --git a/internal/services/appservice/windows_function_app_resource_test.go b/internal/services/appservice/windows_function_app_resource_test.go
index 5aaccc64cd52..25729c5ea3ff 100644
--- a/internal/services/appservice/windows_function_app_resource_test.go
+++ b/internal/services/appservice/windows_function_app_resource_test.go
@@ -34,6 +34,23 @@ func TestAccWindowsFunctionApp_basicBasicPlan(t *testing.T) {
 	})
 }
 
+func TestAccWindowsFunctionApp_basicRuntimeCheck(t *testing.T) {
+	data := acceptance.BuildTestData(t, "azurerm_windows_function_app", "test")
+	r := WindowsFunctionAppResource{}
+
+	data.ResourceTest(t, r, []acceptance.TestStep{
+		{
+			Config: r.runtimeScaleCheck(data, SkuElasticPremiumPlan),
+			Check: acceptance.ComposeTestCheckFunc(
+				check.That(data.ResourceName).ExistsInAzure(r),
+				check.That(data.ResourceName).Key("kind").HasValue("functionapp"),
+				check.That(data.ResourceName).Key("site_config.0.runtime_scale_monitoring_enabled").HasValue("true"),
+			),
+		},
+		data.ImportStep(),
+	})
+}
+
 func TestAccWindowsFunctionApp_basicConsumptionPlan(t *testing.T) {
 	data := acceptance.BuildTestData(t, "azurerm_windows_function_app", "test")
 	r := WindowsFunctionAppResource{}
@@ -1259,6 +1276,31 @@ resource "azurerm_windows_function_app" "test" {
 `, r.template(data, planSku), data.RandomInteger)
 }
 
+func (r WindowsFunctionAppResource) runtimeScaleCheck(data acceptance.TestData, planSku string) string {
+	return fmt.Sprintf(`
+provider "azurerm" {
+  features {}
+}
+
+%s
+
+resource "azurerm_windows_function_app" "test" {
+  name                = "acctest-WFA-%d"
+  location            = azurerm_resource_group.test.location
+  resource_group_name = azurerm_resource_group.test.name
+  service_plan_id     = azurerm_service_plan.test.id
+
+  storage_account_name       = azurerm_storage_account.test.name
+  storage_account_access_key = azurerm_storage_account.test.primary_access_key
+
+  site_config {
+    runtime_scale_monitoring_enabled = true
+    pre_warmed_instance_count        = 1
+  }
+}
+`, r.template(data, planSku), data.RandomInteger)
+}
+
 func (r WindowsFunctionAppResource) appSettings(data acceptance.TestData, planSku string) string {
 	return fmt.Sprintf(`
 provider "azurerm" {
diff --git a/website/docs/r/linux_function_app.html.markdown b/website/docs/r/linux_function_app.html.markdown
index 7539c3dd0861..90de526e7ffd 100644
--- a/website/docs/r/linux_function_app.html.markdown
+++ b/website/docs/r/linux_function_app.html.markdown
@@ -434,7 +434,9 @@ A `site_config` block supports the following:
 
 * `remote_debugging_version` - (Optional) The Remote Debugging Version. Possible values include `VS2017` and `VS2019`.
 
-* `runtime_scale_monitoring_enabled` - (Optional) Should Scale Monitoring of the Functions Runtime be enabled? 
+* `runtime_scale_monitoring_enabled` - (Optional) Should Scale Monitoring of the Functions Runtime be enabled?
+
+~> **NOTE:** Functions runtime scale monitoring can only be enabled for Elastic Premium Function Apps or Workflow Standard Logic Apps and requires a minimum prewarmed instance count of 1.
 
 * `scm_ip_restriction` - (Optional) One or more `scm_ip_restriction` blocks as defined above.
 
diff --git a/website/docs/r/windows_function_app.html.markdown b/website/docs/r/windows_function_app.html.markdown
index 2ad52917d16c..b733fd8076c1 100644
--- a/website/docs/r/windows_function_app.html.markdown
+++ b/website/docs/r/windows_function_app.html.markdown
@@ -410,6 +410,8 @@ A `site_config` block supports the following:
 
 * `runtime_scale_monitoring_enabled` - (Optional) Should Scale Monitoring of the Functions Runtime be enabled? 
 
+~> **NOTE:** Functions runtime scale monitoring can only be enabled for Elastic Premium Function Apps or Workflow Standard Logic Apps and requires a minimum prewarmed instance count of 1.
+
 * `scm_ip_restriction` - (Optional) One or more `scm_ip_restriction` blocks as defined above.
 
 * `scm_minimum_tls_version` - (Optional) Configures the minimum version of TLS required for SSL requests to the SCM site. Possible values include: `1.0`, `1.1`, and  `1.2`. Defaults to `1.2`.