diff --git a/src/AbpDesk/Web_PlugIns/AbpDesk.MongoBlog.dll b/src/AbpDesk/Web_PlugIns/AbpDesk.MongoBlog.dll
index 9b260304f6..629eb6cda8 100644
Binary files a/src/AbpDesk/Web_PlugIns/AbpDesk.MongoBlog.dll and b/src/AbpDesk/Web_PlugIns/AbpDesk.MongoBlog.dll differ
diff --git a/src/Volo.Abp.Account.Web/Areas/Account/Controllers/AccountControllerBase.cs b/src/Volo.Abp.Account.Web/Areas/Account/Controllers/AccountControllerBase.cs
index 9b720ab123..47ab906343 100644
--- a/src/Volo.Abp.Account.Web/Areas/Account/Controllers/AccountControllerBase.cs
+++ b/src/Volo.Abp.Account.Web/Areas/Account/Controllers/AccountControllerBase.cs
@@ -1,4 +1,6 @@
 using System;
+using System.Collections.Generic;
+using System.Linq;
 using Microsoft.AspNetCore.Identity;
 using Microsoft.AspNetCore.Mvc;
 using Volo.Abp.AspNetCore.Mvc;
@@ -17,7 +19,7 @@ namespace Volo.Abp.Account.Web.Areas.Account.Controllers
         {
             if (!identityResult.Succeeded)
             {
-                throw new UserFriendlyException("Operation failed!");
+                throw new UserFriendlyException("Operation failed: " + identityResult.Errors.Select(e => $"[{e.Code}] {e.Description}").JoinAsString(", "));
             }
 
             //identityResult.CheckErrors(LocalizationManager); //TODO: Get from old Abp
diff --git a/src/Volo.Abp.Identity.Application/Volo/Abp/Identity/IdentityAppServiceBase.cs b/src/Volo.Abp.Identity.Application/Volo/Abp/Identity/IdentityAppServiceBase.cs
new file mode 100644
index 0000000000..a6392dfb48
--- /dev/null
+++ b/src/Volo.Abp.Identity.Application/Volo/Abp/Identity/IdentityAppServiceBase.cs
@@ -0,0 +1,21 @@
+using System.Collections.Generic;
+using System.Linq;
+using Microsoft.AspNetCore.Identity;
+using Volo.Abp.Application.Services;
+using Volo.Abp.Ui;
+
+namespace Volo.Abp.Identity
+{
+    public abstract class IdentityAppServiceBase : ApplicationService
+    {
+        protected void CheckIdentityErrors(IdentityResult identityResult)
+        {
+            if (!identityResult.Succeeded)
+            {
+                throw new UserFriendlyException("Operation failed: " + identityResult.Errors.Select(e => $"[{e.Code}] {e.Description}").JoinAsString(", "));
+            }
+
+            //identityResult.CheckErrors(LocalizationManager); //TODO: Get from old Abp
+        }
+    }
+}
diff --git a/src/Volo.Abp.Identity.Application/Volo/Abp/Identity/IdentityUserAppService.cs b/src/Volo.Abp.Identity.Application/Volo/Abp/Identity/IdentityUserAppService.cs
index 97b578832b..7b9425018c 100644
--- a/src/Volo.Abp.Identity.Application/Volo/Abp/Identity/IdentityUserAppService.cs
+++ b/src/Volo.Abp.Identity.Application/Volo/Abp/Identity/IdentityUserAppService.cs
@@ -2,13 +2,12 @@
 using System.Collections.Generic;
 using System.Threading.Tasks;
 using Volo.Abp.Application.Dtos;
-using Volo.Abp.Application.Services;
 
 namespace Volo.Abp.Identity
 {
     //TODO: Consider a way of passing cancellation token to all async application service methods!
 
-    public class IdentityUserAppService : ApplicationService, IIdentityUserAppService
+    public class IdentityUserAppService : IdentityAppServiceBase, IIdentityUserAppService
     {
         private readonly IdentityUserManager _userManager;
         private readonly IIdentityUserRepository _userRepository;
@@ -41,8 +40,9 @@ namespace Volo.Abp.Identity
         {
             var user = new IdentityUser(GuidGenerator.Create(), input.UserName);
 
+            CheckIdentityErrors(await _userManager.CreateAsync(user, input.Password));
             await UpdateUserByInput(user, input);
-            await _userManager.CreateAsync(user, input.Password);
+
             await CurrentUnitOfWork.SaveChangesAsync();
 
             return ObjectMapper.Map<IdentityUser, IdentityUserDto>(user);
@@ -52,9 +52,9 @@ namespace Volo.Abp.Identity
         {
             var user = await _userManager.GetByIdAsync(id);
 
-            await _userManager.SetUserNameAsync(user, input.UserName);
+            CheckIdentityErrors(await _userManager.SetUserNameAsync(user, input.UserName));
             await UpdateUserByInput(user, input);
-            await _userManager.UpdateAsync(user);
+            CheckIdentityErrors(await _userManager.UpdateAsync(user));
             await CurrentUnitOfWork.SaveChangesAsync();
 
             return ObjectMapper.Map<IdentityUser, IdentityUserDto>(user);
@@ -63,7 +63,7 @@ namespace Volo.Abp.Identity
         public async Task DeleteAsync(Guid id)
         {
             var user = await _userManager.GetByIdAsync(id);
-            await _userManager.DeleteAsync(user);
+            CheckIdentityErrors(await _userManager.DeleteAsync(user));
         }
 
         public async Task<ListResultDto<IdentityRoleDto>> GetRolesAsync(Guid id)
@@ -77,19 +77,19 @@ namespace Volo.Abp.Identity
         public async Task UpdateRolesAsync(Guid id, IdentityUserUpdateRolesDto input)
         {
             var user = await _userManager.GetByIdAsync(id);
-            await _userManager.SetRolesAsync(user, input.RoleNames);
+            CheckIdentityErrors(await _userManager.SetRolesAsync(user, input.RoleNames));
         }
 
         private async Task UpdateUserByInput(IdentityUser user, IdentityUserCreateOrUpdateDtoBase input)
         {
-            await _userManager.SetEmailAsync(user, input.Email);
-            await _userManager.SetPhoneNumberAsync(user, input.PhoneNumber);
-            await _userManager.SetTwoFactorEnabledAsync(user, input.TwoFactorEnabled);
-            await _userManager.SetLockoutEnabledAsync(user, input.LockoutEnabled);
+            CheckIdentityErrors(await _userManager.SetEmailAsync(user, input.Email));
+            CheckIdentityErrors(await _userManager.SetPhoneNumberAsync(user, input.PhoneNumber));
+            CheckIdentityErrors(await _userManager.SetTwoFactorEnabledAsync(user, input.TwoFactorEnabled));
+            CheckIdentityErrors(await _userManager.SetLockoutEnabledAsync(user, input.LockoutEnabled));
 
             if (input.RoleNames != null)
             {
-                await _userManager.SetRolesAsync(user, input.RoleNames);
+                CheckIdentityErrors(await _userManager.SetRolesAsync(user, input.RoleNames));
             }
         }
     }
diff --git a/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserManager.cs b/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserManager.cs
index 92cee54e1b..4bfb31154c 100644
--- a/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserManager.cs
+++ b/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserManager.cs
@@ -47,15 +47,26 @@ namespace Volo.Abp.Identity
             return user;
         }
 
-        public async Task SetRolesAsync([NotNull] IdentityUser user, [NotNull] IEnumerable<string> roleNames)
+        public async Task<IdentityResult> SetRolesAsync([NotNull] IdentityUser user, [NotNull] IEnumerable<string> roleNames)
         {
             Check.NotNull(user, nameof(user));
             Check.NotNull(roleNames, nameof(roleNames));
             
             var currentRoleNames = await GetRolesAsync(user);
 
-            await RemoveFromRolesAsync(user, currentRoleNames.Except(roleNames).Distinct());
-            await AddToRolesAsync(user, roleNames.Except(currentRoleNames).Distinct());
+            var result = await RemoveFromRolesAsync(user, currentRoleNames.Except(roleNames).Distinct());
+            if (!result.Succeeded)
+            {
+                return result;
+            }
+
+            result = await AddToRolesAsync(user, roleNames.Except(currentRoleNames).Distinct());
+            if (!result.Succeeded)
+            {
+                return result;
+            }
+
+            return IdentityResult.Success;
         }
     }
 }
diff --git a/test/Volo.Abp.Identity.Application.Tests/Volo/Abp/Identity/IdentityUserAppService_Tests.cs b/test/Volo.Abp.Identity.Application.Tests/Volo/Abp/Identity/IdentityUserAppService_Tests.cs
index 4025713ae1..7cb07c46b0 100644
--- a/test/Volo.Abp.Identity.Application.Tests/Volo/Abp/Identity/IdentityUserAppService_Tests.cs
+++ b/test/Volo.Abp.Identity.Application.Tests/Volo/Abp/Identity/IdentityUserAppService_Tests.cs
@@ -63,7 +63,7 @@ namespace Volo.Abp.Identity
                 Email = CreateRandomEmail(),
                 LockoutEnabled = true,
                 PhoneNumber = CreateRandomPhoneNumber(),
-                Password = "123qwe",
+                Password = "123qwE4r*",
                 RoleNames = new[] { "moderator" }
             };