diff --git a/internal/services/loganalytics/log_analytics_saved_search_resource.go b/internal/services/loganalytics/log_analytics_saved_search_resource.go
index 3a9f67b31c2d..d75735466f4d 100644
--- a/internal/services/loganalytics/log_analytics_saved_search_resource.go
+++ b/internal/services/loganalytics/log_analytics_saved_search_resource.go
@@ -91,8 +91,9 @@ func resourceLogAnalyticsSavedSearch() *pluginsdk.Resource {
 				ForceNew: true,
 				Elem: &pluginsdk.Schema{
 					Type: pluginsdk.TypeString,
+					// https://learn.microsoft.com/en-us/azure/data-explorer/kusto/query/functions/user-defined-functions
 					ValidateFunc: validation.StringMatch(
-						regexp.MustCompile(`^[a-zA-Z0-9!-_]*:[a-zA-Z0-9!_-]+=[a-zA-Z0-9!_-]+|^[a-zA-Z0-9!-_]*:[a-zA-Z0-9!_-]+`),
+						regexp.MustCompile(`^[a-zA-Z_][a-zA-Z0-9-_]*:([a-z]+(=[^,\n]+)?|\(\*\)|(\([a-zA-Z_][a-zA-Z0-9-_]*:[a-z]+(,[a-zA-Z_][a-zA-Z0-9-_]*:([a-z]+))*\)))(,\s*[a-zA-Z_][a-zA-Z0-9-_]*:([a-z]+(=[^,\n]+)?|\(\*\)|(\([a-zA-Z_][a-zA-Z0-9-_]*:[a-z]+(,\s*[a-zA-Z_][a-zA-Z0-9-_]*:([a-z]+))*\))))*$`),
 						"Log Analytics Saved Search Function Parameters must be in the following format: param-name1:type1=default_value1 OR param-name1:type1 OR param-name1:string='string goes here'",
 					),
 				},
diff --git a/internal/services/loganalytics/log_analytics_saved_search_resource_test.go b/internal/services/loganalytics/log_analytics_saved_search_resource_test.go
index 59a767807447..b9c3a8a2ecd5 100644
--- a/internal/services/loganalytics/log_analytics_saved_search_resource_test.go
+++ b/internal/services/loganalytics/log_analytics_saved_search_resource_test.go
@@ -64,6 +64,35 @@ func TestAccLogAnalyticsSavedSearch_withTag(t *testing.T) {
 	})
 }
 
+func TestAccLogAnalyticsSavedSearch_functionParameter(t *testing.T) {
+	data := acceptance.BuildTestData(t, "azurerm_log_analytics_saved_search", "test")
+	r := LogAnalyticsSavedSearchResource{}
+
+	data.ResourceTest(t, r, []acceptance.TestStep{
+		{
+			Config: r.function_parameter(data, "foo:(*)"),
+			Check: acceptance.ComposeTestCheckFunc(
+				check.That(data.ResourceName).ExistsInAzure(r),
+			),
+		},
+		data.ImportStep(),
+		{
+			Config: r.function_parameter(data, "foo:int=1"),
+			Check: acceptance.ComposeTestCheckFunc(
+				check.That(data.ResourceName).ExistsInAzure(r),
+			),
+		},
+		data.ImportStep(),
+		{
+			Config: r.function_parameter(data, "foo:(bar:long)"),
+			Check: acceptance.ComposeTestCheckFunc(
+				check.That(data.ResourceName).ExistsInAzure(r),
+			),
+		},
+		data.ImportStep(),
+	})
+}
+
 func TestAccLogAnalyticsSavedSearch_requiresImport(t *testing.T) {
 	data := acceptance.BuildTestData(t, "azurerm_log_analytics_saved_search", "test")
 	r := LogAnalyticsSavedSearchResource{}
@@ -120,7 +149,7 @@ resource "azurerm_log_analytics_saved_search" "test" {
 
   category     = "Saved Search Test Category"
   display_name = "Create or Update Saved Search Test"
-  query        = "Heartbeat | summarize Count() by Computer | take a"
+  query        = "Heartbeat | summarize Count() by Computer | take 1"
 }
 `, data.RandomInteger, data.Locations.Primary, data.RandomInteger, data.RandomInteger)
 }
@@ -164,7 +193,7 @@ resource "azurerm_log_analytics_saved_search" "test" {
 
   category     = "Saved Search Test Category"
   display_name = "Create or Update Saved Search Test"
-  query        = "Heartbeat | summarize Count() by Computer | take a"
+  query        = "Heartbeat | summarize Count() by Computer | take 1"
 
   function_alias      = "heartbeat_func"
   function_parameters = ["a:int=1", "b:int=2", "c:int=3"]
@@ -172,6 +201,38 @@ resource "azurerm_log_analytics_saved_search" "test" {
 `, data.RandomInteger, data.Locations.Primary, data.RandomInteger, data.RandomInteger)
 }
 
+func (LogAnalyticsSavedSearchResource) function_parameter(data acceptance.TestData, para string) string {
+	return fmt.Sprintf(`
+provider "azurerm" {
+  features {}
+}
+
+resource "azurerm_resource_group" "test" {
+  name     = "acctestRG-%d"
+  location = "%s"
+}
+
+resource "azurerm_log_analytics_workspace" "test" {
+  name                = "acctestLAW-%d"
+  location            = azurerm_resource_group.test.location
+  resource_group_name = azurerm_resource_group.test.name
+  sku                 = "PerGB2018"
+}
+
+resource "azurerm_log_analytics_saved_search" "test" {
+  name                       = "acctestLASS-%d"
+  log_analytics_workspace_id = azurerm_log_analytics_workspace.test.id
+
+  category     = "Saved Search Test Category"
+  display_name = "Create or Update Saved Search Test"
+  query        = "Heartbeat | summarize Count() by Computer | take 1"
+
+  function_alias      = "heartbeat_func"
+  function_parameters = ["%s"]
+}
+`, data.RandomInteger, data.Locations.Primary, data.RandomInteger, data.RandomInteger, para)
+}
+
 func (LogAnalyticsSavedSearchResource) withTag(data acceptance.TestData) string {
 	return fmt.Sprintf(`
 provider "azurerm" {
@@ -196,7 +257,7 @@ resource "azurerm_log_analytics_saved_search" "test" {
 
   category     = "Saved Search Test Category"
   display_name = "Create or Update Saved Search Test"
-  query        = "Heartbeat | summarize Count() by Computer | take a"
+  query        = "Heartbeat | summarize Count() by Computer | take 1"
 
   tags = {
     "Environment" = "Test"
diff --git a/website/docs/r/log_analytics_saved_search.html.markdown b/website/docs/r/log_analytics_saved_search.html.markdown
index 755c97ddae97..499182072ac8 100644
--- a/website/docs/r/log_analytics_saved_search.html.markdown
+++ b/website/docs/r/log_analytics_saved_search.html.markdown
@@ -52,7 +52,7 @@ The following arguments are supported:
 
 * `function_alias` - (Optional) The function alias if the query serves as a function. Changing this forces a new resource to be created.
 
-* `function_parameters` - (Optional) The function parameters if the query serves as a function. Changing this forces a new resource to be created.
+* `function_parameters` - (Optional) The function parameters if the query serves as a function. Changing this forces a new resource to be created. For more examples and proper syntax please refer to [this document](https://learn.microsoft.com/en-us/azure/data-explorer/kusto/query/functions/user-defined-functions).
 
 * `tags` - (Optional) A mapping of tags which should be assigned to the Logs Analytics Saved Search. Changing this forces a new resource to be created.