diff --git a/modules/identity/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/IdentityErrorCodes.cs b/modules/identity/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/IdentityErrorCodes.cs
index ff808d9fbb..4e681c3ea1 100644
--- a/modules/identity/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/IdentityErrorCodes.cs
+++ b/modules/identity/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/IdentityErrorCodes.cs
@@ -10,4 +10,5 @@ public static class IdentityErrorCodes
     public const string StaticRoleDeletion = "Volo.Abp.Identity:010006";
     public const string UsersCanNotChangeTwoFactor = "Volo.Abp.Identity:010007";
     public const string CanNotChangeTwoFactor = "Volo.Abp.Identity:010008";
+    public const string YouCannotDelegateYourself = "Volo.Abp.Identity:010009";
 }
diff --git a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IIdentityUserDelegationRepository.cs b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IIdentityUserDelegationRepository.cs
index c60b998b64..f880e7264f 100644
--- a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IIdentityUserDelegationRepository.cs
+++ b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IIdentityUserDelegationRepository.cs
@@ -13,8 +13,11 @@ public interface IIdentityUserDelegationRepository: IBasicRepository<IdentityUse
         Guid? targetUserId,
         CancellationToken cancellationToken = default);
 
-    Task<IdentityUserDelegation> FindAsync(
+    Task<List<IdentityUserDelegation>> GetActiveDelegationsAsync(
         Guid sourceUserId,
-        Guid targetUserId,
+        CancellationToken cancellationToken = default);
+
+    Task<IdentityUserDelegation> FindActiveDelegationByIdAsync(
+        Guid id,
         CancellationToken cancellationToken = default);
 }
diff --git a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserDelegationManager.cs b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserDelegationManager.cs
index 4d08385835..14e91111d6 100644
--- a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserDelegationManager.cs
+++ b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserDelegationManager.cs
@@ -19,6 +19,35 @@ public class IdentityUserDelegationManager : DomainService
     {
         return await IdentityUserDelegationRepository.GetListAsync(sourceUserId, targetUserId, cancellationToken: cancellationToken);
     }
+    
+    public virtual async Task<List<IdentityUserDelegation>> GetActiveDelegationsAsync(Guid sourceUserId, CancellationToken cancellationToken = default)
+    {
+        return await IdentityUserDelegationRepository.GetActiveDelegationsAsync(sourceUserId, cancellationToken: cancellationToken);
+    }
+
+    public virtual async Task<IdentityUserDelegation> FindActiveDelegationByIdAsync(Guid id, CancellationToken cancellationToken = default)
+    {
+        return await IdentityUserDelegationRepository.FindActiveDelegationByIdAsync(id, cancellationToken: cancellationToken);
+    }
+
+    public virtual async Task DelegateNewUserAsync(Guid sourceUserId, IdentityUser targetUser, DateTime startTime, DateTime endTime, CancellationToken cancellationToken = default)
+    {
+        if (sourceUserId == targetUser.Id)
+        {
+            throw new BusinessException(IdentityErrorCodes.YouCannotDelegateYourself);
+        }
+        
+        await IdentityUserDelegationRepository.InsertAsync(
+            new IdentityUserDelegation(
+                GuidGenerator.Create(),
+                sourceUserId,
+                targetUser.Id,
+                startTime,
+                endTime
+            ),
+            cancellationToken: cancellationToken
+        );
+    }
 
     public virtual async Task DeleteDelegationAsync(Guid id, Guid sourceUserId, CancellationToken cancellationToken = default)
     {
@@ -30,11 +59,6 @@ public class IdentityUserDelegationManager : DomainService
         }
     }
 
-    public virtual async Task<bool> IsDelegatedAsync(Guid sourceUserId, Guid targetUserId, CancellationToken cancellationToken = default)
-    {
-        return await IdentityUserDelegationRepository.FindAsync(sourceUserId, targetUserId, cancellationToken: cancellationToken) != null;
-    }
-
     public virtual Task<bool> IsExpiredAsync(IdentityUserDelegation userDelegation)
     {
         return Task.FromResult(userDelegation.EndTime <= Clock.Now);
diff --git a/modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/EfCoreIdentityUserDelegationRepository.cs b/modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/EfCoreIdentityUserDelegationRepository.cs
index 4f455c2d68..1e28b68e80 100644
--- a/modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/EfCoreIdentityUserDelegationRepository.cs
+++ b/modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/EfCoreIdentityUserDelegationRepository.cs
@@ -6,14 +6,18 @@ using System.Threading.Tasks;
 using Microsoft.EntityFrameworkCore;
 using Volo.Abp.Domain.Repositories.EntityFrameworkCore;
 using Volo.Abp.EntityFrameworkCore;
+using Volo.Abp.Timing;
 
 namespace Volo.Abp.Identity.EntityFrameworkCore;
 
 public class EfCoreIdentityUserDelegationRepository : EfCoreRepository<IIdentityDbContext, IdentityUserDelegation, Guid>, IIdentityUserDelegationRepository
 {
-    public EfCoreIdentityUserDelegationRepository(IDbContextProvider<IIdentityDbContext> dbContextProvider)
+    protected IClock Clock { get; }
+    
+    public EfCoreIdentityUserDelegationRepository(IDbContextProvider<IIdentityDbContext> dbContextProvider, IClock clock)
         : base(dbContextProvider)
     {
+        Clock = clock;
     }
 
     public async Task<List<IdentityUserDelegation>> GetListAsync(Guid? sourceUserId, Guid? targetUserId, CancellationToken cancellationToken = default)
@@ -25,13 +29,24 @@ public class EfCoreIdentityUserDelegationRepository : EfCoreRepository<IIdentity
             .ToListAsync(cancellationToken: cancellationToken);
     }
 
-    public async Task<IdentityUserDelegation> FindAsync(Guid sourceUserId, Guid targetUserId, CancellationToken cancellationToken = default)
+    public async Task<List<IdentityUserDelegation>> GetActiveDelegationsAsync(Guid sourceUserId, CancellationToken cancellationToken = default)
+    {
+        return await (await GetDbSetAsync())
+            .AsNoTracking()
+            .Where(x => x.SourceUserId == sourceUserId && 
+                        x.StartTime <= Clock.Now && 
+                        x.EndTime >= Clock.Now)
+            .ToListAsync(cancellationToken: cancellationToken);
+    }
+
+    public async Task<IdentityUserDelegation> FindActiveDelegationByIdAsync(Guid id, CancellationToken cancellationToken = default)
     {
         return await (await GetDbSetAsync())
             .AsNoTracking()
             .FirstOrDefaultAsync(x =>
-                    x.SourceUserId == sourceUserId &&
-                    x.TargetUserId == targetUserId
+                    x.Id == id &&
+                    x.StartTime <= Clock.Now &&
+                    x.EndTime >= Clock.Now
                 , cancellationToken: GetCancellationToken(cancellationToken));
     }
 }
diff --git a/modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/IdentityDbContextModelBuilderExtensions.cs b/modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/IdentityDbContextModelBuilderExtensions.cs
index 7520b12e26..f85f72e84e 100644
--- a/modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/IdentityDbContextModelBuilderExtensions.cs
+++ b/modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/IdentityDbContextModelBuilderExtensions.cs
@@ -276,11 +276,6 @@ public static class IdentityDbContextModelBuilderExtensions
 
             b.ConfigureByConvention();
 
-            b.HasIndex(x => new {
-                x.SourceUserId,
-                x.TargetUserId,
-            }).IsUnique();
-
             b.ApplyObjectExtensionMappings();
         });
 
diff --git a/modules/identity/src/Volo.Abp.Identity.MongoDB/Volo/Abp/Identity/MongoDB/MongoIdentityUserDelegationRepository.cs b/modules/identity/src/Volo.Abp.Identity.MongoDB/Volo/Abp/Identity/MongoDB/MongoIdentityUserDelegationRepository.cs
index ac9ac753e6..37cfc52e9c 100644
--- a/modules/identity/src/Volo.Abp.Identity.MongoDB/Volo/Abp/Identity/MongoDB/MongoIdentityUserDelegationRepository.cs
+++ b/modules/identity/src/Volo.Abp.Identity.MongoDB/Volo/Abp/Identity/MongoDB/MongoIdentityUserDelegationRepository.cs
@@ -7,14 +7,18 @@ using MongoDB.Driver;
 using MongoDB.Driver.Linq;
 using Volo.Abp.Domain.Repositories.MongoDB;
 using Volo.Abp.MongoDB;
+using Volo.Abp.Timing;
 
 namespace Volo.Abp.Identity.MongoDB;
 
 public class MongoIdentityUserDelegationRepository : MongoDbRepository<IAbpIdentityMongoDbContext, IdentityUserDelegation, Guid>, IIdentityUserDelegationRepository
 {
-    public MongoIdentityUserDelegationRepository(IMongoDbContextProvider<IAbpIdentityMongoDbContext> dbContextProvider)
+    protected IClock Clock { get; }
+    
+    public MongoIdentityUserDelegationRepository(IMongoDbContextProvider<IAbpIdentityMongoDbContext> dbContextProvider, IClock clock)
         : base(dbContextProvider)
     {
+        Clock = clock;
     }
 
     public async Task<List<IdentityUserDelegation>> GetListAsync(Guid? sourceUserId, Guid? targetUserId,
@@ -27,12 +31,22 @@ public class MongoIdentityUserDelegationRepository : MongoDbRepository<IAbpIdent
             .ToListAsync(cancellationToken: cancellationToken);
     }
 
-    public async Task<IdentityUserDelegation> FindAsync(Guid sourceUserId, Guid targetUserId, CancellationToken cancellationToken = default)
+    public async Task<List<IdentityUserDelegation>> GetActiveDelegationsAsync(Guid sourceUserId, CancellationToken cancellationToken = default)
+    {
+        return await (await GetMongoQueryableAsync(cancellationToken))
+            .Where(x => x.SourceUserId == sourceUserId)
+            .Where(x => x.StartTime <= Clock.Now && x.EndTime >= Clock.Now)
+            .As<IMongoQueryable<IdentityUserDelegation>>()
+            .ToListAsync(cancellationToken: cancellationToken);
+    }
+
+    public async Task<IdentityUserDelegation> FindActiveDelegationByIdAsync(Guid id, CancellationToken cancellationToken = default)
     {
         return await (await GetMongoQueryableAsync(cancellationToken))
             .FirstOrDefaultAsync(x =>
-                    x.SourceUserId == sourceUserId &&
-                    x.TargetUserId == targetUserId
+                    x.Id == id &&
+                    x.StartTime <= Clock.Now &&
+                    x.EndTime >= Clock.Now
                 , cancellationToken: GetCancellationToken(cancellationToken));
     }
 }