diff --git a/modules/identity/src/Volo.Abp.Identity.Application.Contracts/Volo/Abp/Identity/IIdentityUserLookupAppService.cs b/modules/identity/src/Volo.Abp.Identity.Application.Contracts/Volo/Abp/Identity/IIdentityUserLookupAppService.cs
index 7a14579af5..d7ae1a5291 100644
--- a/modules/identity/src/Volo.Abp.Identity.Application.Contracts/Volo/Abp/Identity/IIdentityUserLookupAppService.cs
+++ b/modules/identity/src/Volo.Abp.Identity.Application.Contracts/Volo/Abp/Identity/IIdentityUserLookupAppService.cs
@@ -6,6 +6,7 @@ using Volo.Abp.Users;
 
 namespace Volo.Abp.Identity;
 
+[Obsolete("Use IIdentityUserIntegrationService for module-to-module (or service-to-service) communication.")]
 public interface IIdentityUserLookupAppService : IApplicationService
 {
     Task<UserData> FindByIdAsync(Guid id);
diff --git a/modules/identity/src/Volo.Abp.Identity.Application/Volo/Abp/Identity/IdentityUserLookupAppService.cs b/modules/identity/src/Volo.Abp.Identity.Application/Volo/Abp/Identity/IdentityUserLookupAppService.cs
index 297032c7a9..7595de7a23 100644
--- a/modules/identity/src/Volo.Abp.Identity.Application/Volo/Abp/Identity/IdentityUserLookupAppService.cs
+++ b/modules/identity/src/Volo.Abp.Identity.Application/Volo/Abp/Identity/IdentityUserLookupAppService.cs
@@ -7,7 +7,7 @@ using Volo.Abp.Users;
 
 namespace Volo.Abp.Identity;
 
-[Obsolete("Use IIdentityUserIntegrationService for module-to-module (or service-to-service) communication.")]
+[Obsolete("Use IdentityUserIntegrationService for module-to-module (or service-to-service) communication.")]
 [Authorize(IdentityPermissions.UserLookup.Default)]
 public class IdentityUserLookupAppService : IdentityAppServiceBase, IIdentityUserLookupAppService
 {
diff --git a/modules/identity/test/Volo.Abp.Identity.Application.Tests/Volo/Abp/Identity/IdentityUserLookupAppService_Tests.cs b/modules/identity/test/Volo.Abp.Identity.Application.Tests/Volo/Abp/Identity/Integration/IdentityUserIntegrationService_Tests.cs
similarity index 56%
rename from modules/identity/test/Volo.Abp.Identity.Application.Tests/Volo/Abp/Identity/IdentityUserLookupAppService_Tests.cs
rename to modules/identity/test/Volo.Abp.Identity.Application.Tests/Volo/Abp/Identity/Integration/IdentityUserIntegrationService_Tests.cs
index e774b0e440..a74b5cdcfc 100644
--- a/modules/identity/test/Volo.Abp.Identity.Application.Tests/Volo/Abp/Identity/IdentityUserLookupAppService_Tests.cs
+++ b/modules/identity/test/Volo.Abp.Identity.Application.Tests/Volo/Abp/Identity/Integration/IdentityUserIntegrationService_Tests.cs
@@ -1,23 +1,35 @@
 using System;
+using System.Linq;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Identity;
 using Shouldly;
 using Xunit;
 
-namespace Volo.Abp.Identity;
+namespace Volo.Abp.Identity.Integration;
 
-public class IdentityUserLookupAppService_Tests : AbpIdentityApplicationTestBase
+public class IdentityUserIntegrationService_Tests : AbpIdentityApplicationTestBase
 {
-    private readonly IIdentityUserLookupAppService _identityUserLookupAppService;
+    private readonly IIdentityUserIntegrationService _identityUserIntegrationService;
     private readonly IIdentityUserRepository _identityUserRepository;
     private readonly ILookupNormalizer _lookupNormalizer;
 
-    public IdentityUserLookupAppService_Tests()
+    public IdentityUserIntegrationService_Tests()
     {
-        _identityUserLookupAppService = GetRequiredService<IIdentityUserLookupAppService>();
+        _identityUserIntegrationService = GetRequiredService<IIdentityUserIntegrationService>();
         _identityUserRepository = GetRequiredService<IIdentityUserRepository>();
         _lookupNormalizer = GetRequiredService<ILookupNormalizer>();
     }
+    
+    [Fact]
+    public async Task GetRoleNamesAsync()
+    {
+        var adminUser = await _identityUserRepository.FindByNormalizedUserNameAsync(_lookupNormalizer.NormalizeName("admin"));
+        adminUser.ShouldNotBeNull();
+        
+        var roles = await _identityUserIntegrationService.GetRoleNamesAsync(adminUser.Id);
+        roles.Length.ShouldBe(1);
+        roles.ShouldContain("admin");
+    }
 
     [Fact]
     public async Task FindByIdAsync()
@@ -25,13 +37,13 @@ public class IdentityUserLookupAppService_Tests : AbpIdentityApplicationTestBase
         var user = await _identityUserRepository.FindByNormalizedUserNameAsync(_lookupNormalizer.NormalizeName("john.nash"));
         user.ShouldNotBeNull();
 
-        (await _identityUserLookupAppService.FindByIdAsync(user.Id)).UserName.ShouldBe(user.UserName);
+        (await _identityUserIntegrationService.FindByIdAsync(user.Id)).UserName.ShouldBe(user.UserName);
     }
 
     [Fact]
     public async Task FindById_NotExist_Should_Return_Null()
     {
-        var user = await _identityUserLookupAppService.FindByIdAsync(Guid.NewGuid());
+        var user = await _identityUserIntegrationService.FindByIdAsync(Guid.NewGuid());
         user.ShouldBeNull();
     }
 
@@ -41,20 +53,20 @@ public class IdentityUserLookupAppService_Tests : AbpIdentityApplicationTestBase
         var user = await _identityUserRepository.FindByNormalizedUserNameAsync(_lookupNormalizer.NormalizeName("john.nash"));
         user.ShouldNotBeNull();
 
-        (await _identityUserLookupAppService.FindByUserNameAsync(user.UserName)).UserName.ShouldBe(user.UserName);
+        (await _identityUserIntegrationService.FindByUserNameAsync(user.UserName)).UserName.ShouldBe(user.UserName);
     }
 
     [Fact]
     public async Task FindByUserName_NotExist_Should_Return_Null()
     {
-        var user = await _identityUserLookupAppService.FindByUserNameAsync(Guid.NewGuid().ToString());
+        var user = await _identityUserIntegrationService.FindByUserNameAsync(Guid.NewGuid().ToString());
         user.ShouldBeNull();
     }
 
     [Fact]
     public async Task Search_Without_Filter_And_Sorting()
     {
-        var result = await _identityUserLookupAppService.SearchAsync(new UserLookupSearchInputDto());
+        var result = await _identityUserIntegrationService.SearchAsync(new UserLookupSearchInputDto());
         result.Items.Count.ShouldBeGreaterThanOrEqualTo(3);
         result.Items.ShouldContain(u => u.UserName == "john.nash");
     }
@@ -62,7 +74,7 @@ public class IdentityUserLookupAppService_Tests : AbpIdentityApplicationTestBase
     [Fact]
     public async Task Search_With_Filter()
     {
-        var result = await _identityUserLookupAppService.SearchAsync(
+        var result = await _identityUserIntegrationService.SearchAsync(
             new UserLookupSearchInputDto
             {
                 Filter = "a"
@@ -73,7 +85,7 @@ public class IdentityUserLookupAppService_Tests : AbpIdentityApplicationTestBase
         result.Items.ShouldContain(u => u.UserName == "john.nash");
         result.Items.ShouldContain(u => u.UserName == "david");
 
-        result = await _identityUserLookupAppService.SearchAsync(
+        result = await _identityUserIntegrationService.SearchAsync(
             new UserLookupSearchInputDto
             {
                 Filter = "neo"