diff --git a/internal/services/serviceprincipals/service_principal_data_source.go b/internal/services/serviceprincipals/service_principal_data_source.go
index db9f0479d1..fba3c3022f 100644
--- a/internal/services/serviceprincipals/service_principal_data_source.go
+++ b/internal/services/serviceprincipals/service_principal_data_source.go
@@ -11,6 +11,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/hashicorp/go-azure-helpers/lang/pointer"
 	"github.com/hashicorp/go-azure-sdk/sdk/odata"
 	"github.com/hashicorp/terraform-provider-azuread/internal/clients"
 	"github.com/hashicorp/terraform-provider-azuread/internal/helpers"
@@ -327,11 +328,7 @@ func servicePrincipalDataSourceRead(ctx context.Context, d *pluginsdk.ResourceDa
 		}
 
 		for _, sp := range *result {
-			if sp.DisplayName == nil {
-				continue
-			}
-
-			if *sp.DisplayName == displayName {
+			if strings.EqualFold(pointer.From(sp.DisplayName), displayName) {
 				servicePrincipal = &sp
 				break
 			}
@@ -361,11 +358,7 @@ func servicePrincipalDataSourceRead(ctx context.Context, d *pluginsdk.ResourceDa
 		}
 
 		for _, sp := range *result {
-			if sp.AppId == nil {
-				continue
-			}
-
-			if *sp.AppId == clientId {
+			if strings.EqualFold(pointer.From(sp.AppId), clientId) {
 				servicePrincipal = &sp
 				break
 			}
diff --git a/internal/services/serviceprincipals/service_principal_data_source_test.go b/internal/services/serviceprincipals/service_principal_data_source_test.go
index b5bc786139..d1ee9e3e55 100644
--- a/internal/services/serviceprincipals/service_principal_data_source_test.go
+++ b/internal/services/serviceprincipals/service_principal_data_source_test.go
@@ -75,6 +75,25 @@ func TestAccServicePrincipalDataSource_byObjectId(t *testing.T) {
 	})
 }
 
+func TestAccServicePrincipalDataSource_builtInByDisplayName(t *testing.T) {
+	data := acceptance.BuildTestData(t, "data.azuread_service_principal", "test")
+	r := ServicePrincipalDataSource{}
+
+	data.DataSourceTest(t, []acceptance.TestStep{
+		{
+			Config: r.builtInByDisplayName(data),
+			Check: acceptance.ComposeTestCheckFunc(
+				check.That(data.ResourceName).Key("app_role_ids.%").MatchesRegex(regexp.MustCompile("[0-9]+")),
+				check.That(data.ResourceName).Key("app_roles.#").MatchesRegex(regexp.MustCompile("[0-9]+")),
+				check.That(data.ResourceName).Key("client_id").IsUuid(),
+				check.That(data.ResourceName).Key("display_name").Exists(),
+				check.That(data.ResourceName).Key("oauth2_permission_scope_ids.%").MatchesRegex(regexp.MustCompile("[0-9]+")),
+				check.That(data.ResourceName).Key("oauth2_permission_scopes.#").MatchesRegex(regexp.MustCompile("[0-9]+")),
+			),
+		},
+	})
+}
+
 func (ServicePrincipalDataSource) testCheckFunc(data acceptance.TestData) acceptance.TestCheckFunc {
 	tenantId := os.Getenv("ARM_TENANT_ID")
 	return acceptance.ComposeTestCheckFunc(
@@ -85,6 +104,7 @@ func (ServicePrincipalDataSource) testCheckFunc(data acceptance.TestData) accept
 		check.That(data.ResourceName).Key("app_roles.#").HasValue("2"),
 		check.That(data.ResourceName).Key("application_id").IsUuid(),
 		check.That(data.ResourceName).Key("application_tenant_id").HasValue(tenantId),
+		check.That(data.ResourceName).Key("client_id").IsUuid(),
 		check.That(data.ResourceName).Key("description").HasValue("An internal app for testing"),
 		check.That(data.ResourceName).Key("display_name").Exists(),
 		check.That(data.ResourceName).Key("feature_tags.#").HasValue("1"),
@@ -173,3 +193,13 @@ data "azuread_service_principal" "test" {
 }
 `, ServicePrincipalResource{}.complete(data))
 }
+
+func (ServicePrincipalDataSource) builtInByDisplayName(data acceptance.TestData) string {
+	return `
+provider "azuread" {}
+
+data "azuread_service_principal" "test" {
+  display_name = "MiCrOsOfT GrApH"
+}
+`
+}