diff --git a/Core.Thalos.DAL.API/Controllers/ModuleController.cs b/Core.Thalos.DAL.API/Controllers/ModuleController.cs
index b9e9678..0fac060 100644
--- a/Core.Thalos.DAL.API/Controllers/ModuleController.cs
+++ b/Core.Thalos.DAL.API/Controllers/ModuleController.cs
@@ -66,7 +66,7 @@ namespace LSA.Core.Thalos.API.Controllers
             var result = await service.GetModuleById(_id, cancellationToken);
 
             if (result == null)
-                return NotFound("Entity not found");
+                return NotFound("Module not found");
 
             return Ok(result);
         }
@@ -112,6 +112,10 @@ namespace LSA.Core.Thalos.API.Controllers
         public async Task<IActionResult> ChangeModuleStatus([FromRoute] string _id, [FromRoute] StatusEnum newStatus, CancellationToken cancellationToken)
         {
             var result = await service.ChangeModuleStatus(_id, newStatus, cancellationToken);
+
+            if (result == null)
+                return NotFound("Module not found");
+
             return Ok(result);
         }
 
@@ -133,7 +137,7 @@ namespace LSA.Core.Thalos.API.Controllers
         {
             var result = await service.DeleteModule(_id, cancellationToken);
             if (result == null)
-                return NotFound("Entity not found");
+                return NotFound("Module not found");
 
             return Ok(result);
         }
diff --git a/Core.Thalos.DAL.API/Controllers/PermissionController.cs b/Core.Thalos.DAL.API/Controllers/PermissionController.cs
index ff3372b..75c32b6 100644
--- a/Core.Thalos.DAL.API/Controllers/PermissionController.cs
+++ b/Core.Thalos.DAL.API/Controllers/PermissionController.cs
@@ -9,7 +9,6 @@ using Core.Thalos.BuildingBlocks;
 using Core.Thalos.Provider.Contracts;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
-using Microsoft.Graph;
 using PermissionRequest = Core.Thalos.Domain.Contexts.Onboarding.Request.PermissionRequest;
 using StatusEnum = Core.Blueprint.Mongo.StatusEnum;
 
@@ -91,7 +90,7 @@ namespace LSA.Core.Thalos.API.Controllers
 
             if (result == null)
             {
-                return NotFound("Entity not found");
+                return NotFound("Permission not found");
             }
 
             return Ok(result);
@@ -162,6 +161,10 @@ namespace LSA.Core.Thalos.API.Controllers
         public async Task<IActionResult> ChangePermissionStatus([FromRoute] string _id, [FromRoute] StatusEnum newStatus, CancellationToken cancellationToken)
         {
             var result = await service.ChangePermissionStatus(_id, newStatus, cancellationToken).ConfigureAwait(false);
+
+            if (result == null)
+                return NotFound("Permission not found");
+
             return Ok(result);
         }
 
diff --git a/Core.Thalos.DAL.API/Controllers/RoleController.cs b/Core.Thalos.DAL.API/Controllers/RoleController.cs
index 2955977..aebbb0e 100644
--- a/Core.Thalos.DAL.API/Controllers/RoleController.cs
+++ b/Core.Thalos.DAL.API/Controllers/RoleController.cs
@@ -60,7 +60,7 @@ namespace LSA.Core.Thalos.API.Controllers
 
             if (result == null)
             {
-                return NotFound("Entity not found");
+                return NotFound("Role not found");
             }
 
             return Ok(result);
@@ -126,6 +126,10 @@ namespace LSA.Core.Thalos.API.Controllers
         public async Task<IActionResult> ChangeRoleStatus([FromRoute] string _id, [FromRoute] StatusEnum newStatus, CancellationToken cancellationToken)
         {
             var result = await service.ChangeRoleStatus(_id, newStatus, cancellationToken).ConfigureAwait(false);
+
+            if (result == null)
+                return NotFound("Role not found");
+
             return Ok(result);
         }
 
diff --git a/Core.Thalos.DAL.API/Controllers/TenantController.cs b/Core.Thalos.DAL.API/Controllers/TenantController.cs
index 27c6be9..ef20b3d 100644
--- a/Core.Thalos.DAL.API/Controllers/TenantController.cs
+++ b/Core.Thalos.DAL.API/Controllers/TenantController.cs
@@ -7,6 +7,7 @@
 using Asp.Versioning;
 using Core.Thalos.BuildingBlocks;
 using Core.Thalos.Provider.Contracts;
+using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using StatusEnum = Core.Blueprint.Mongo.StatusEnum;
 using TenantRequest = Core.Thalos.Domain.Contexts.Onboarding.Request.TenantRequest;
@@ -21,7 +22,7 @@ namespace LSA.Core.Thalos.API.Controllers
     [Produces(MimeTypes.ApplicationJson)]
     [Consumes(MimeTypes.ApplicationJson)]
     [ApiController]
-    // [Authorize(AuthenticationSchemes = Schemes.DefaultScheme)]
+    [Authorize(AuthenticationSchemes = Schemes.DefaultScheme)]
     public class TenantController(ITenantProvider service) : ControllerBase
     {
         /// <summary>
@@ -35,7 +36,7 @@ namespace LSA.Core.Thalos.API.Controllers
         [Consumes(MimeTypes.ApplicationJson)]
         [Produces(MimeTypes.ApplicationJson)]
         [ProducesResponseType(typeof(IEnumerable<TenantAdapter>), StatusCodes.Status200OK)]
-        // [Permission("TenantManagement.Read, RoleManagement.Read")]
+        [Permission("TenantManagement.Read, RoleManagement.Read")]
         public async Task<IActionResult> GetAllTenantsAsync(CancellationToken cancellationToken)
         {
             var result = await service.GetAllTenants(cancellationToken).ConfigureAwait(false);
@@ -56,14 +57,14 @@ namespace LSA.Core.Thalos.API.Controllers
         [Consumes(MimeTypes.ApplicationJson)]
         [Produces(MimeTypes.ApplicationJson)]
         [ProducesResponseType(typeof(TenantAdapter), StatusCodes.Status200OK)]
-        // [Permission("TenantManagement.Read")]
+        [Permission("TenantManagement.Read")]
         public async Task<IActionResult> GetTenantByIdAsync([FromRoute] string _id, CancellationToken cancellationToken)
         {
             var result = await service.GetTenantById(_id, cancellationToken).ConfigureAwait(false);
 
             if (result == null)
             {
-                return NotFound("Entity not found");
+                return NotFound("Tenant not found");
             }
 
             return Ok(result);
@@ -80,7 +81,7 @@ namespace LSA.Core.Thalos.API.Controllers
         /// <response code="500">The service internal error.</response>
         [HttpPost]
         [ProducesResponseType(typeof(TenantAdapter), StatusCodes.Status201Created)]
-        // [Permission("TenantManagement.Write")]
+        [Permission("TenantManagement.Write")]
         public async Task<IActionResult> CreateTenantAsync([FromBody] TenantRequest newTenant, CancellationToken cancellationToken)
         {
             var result = await service.CreateTenant(newTenant, cancellationToken).ConfigureAwait(false);
@@ -103,7 +104,7 @@ namespace LSA.Core.Thalos.API.Controllers
         [Consumes(MimeTypes.ApplicationJson)]
         [Produces(MimeTypes.ApplicationJson)]
         [ProducesResponseType(typeof(TenantAdapter), StatusCodes.Status200OK)]
-        // [Permission("TenantManagement.Write")]
+        [Permission("TenantManagement.Write")]
         public async Task<IActionResult> UpdateTenantAsync([FromRoute] string _id, [FromBody] TenantAdapter entity, CancellationToken cancellationToken)
         {
             if (_id != entity._Id)
@@ -112,7 +113,9 @@ namespace LSA.Core.Thalos.API.Controllers
             }
 
             var result = await service.UpdateTenant(entity, cancellationToken).ConfigureAwait(false);
-            return Ok(result);
+
+            if (result is not null) return Ok(result);
+            else return NotFound("Tenant not found");
         }
 
         /// <summary>
@@ -129,10 +132,14 @@ namespace LSA.Core.Thalos.API.Controllers
         [Consumes(MimeTypes.ApplicationJson)]
         [Produces(MimeTypes.ApplicationJson)]
         [ProducesResponseType(typeof(TenantAdapter), StatusCodes.Status200OK)]
-        // [Permission("TenantManagement.Write")]
+        [Permission("TenantManagement.Write")]
         public async Task<IActionResult> ChangeTenantStatus([FromRoute] string _id, [FromRoute] StatusEnum newStatus, CancellationToken cancellationToken)
         {
             var result = await service.ChangeTenantStatus(_id, newStatus, cancellationToken).ConfigureAwait(false);
+
+            if (result == null)
+                return NotFound("Tenant not found");
+
             return Ok(result);
         }
 
@@ -148,7 +155,7 @@ namespace LSA.Core.Thalos.API.Controllers
         [HttpDelete]
         [Route(Routes.Id)]
         [ProducesResponseType(typeof(TenantAdapter), StatusCodes.Status200OK)]
-        // [Permission("TenantManagement.Write")]
+        [Permission("TenantManagement.Write")]
         public async Task<IActionResult> DeleteTenantAsync([FromRoute] string _id, CancellationToken cancellationToken)
         {
             var result = await service.DeleteTenant(_id, cancellationToken).ConfigureAwait(false);
diff --git a/Core.Thalos.DAL.API/Controllers/UserController.cs b/Core.Thalos.DAL.API/Controllers/UserController.cs
index 705f4a7..6b7add9 100644
--- a/Core.Thalos.DAL.API/Controllers/UserController.cs
+++ b/Core.Thalos.DAL.API/Controllers/UserController.cs
@@ -9,7 +9,6 @@ using Core.Thalos.BuildingBlocks;
 using Core.Thalos.Provider.Contracts;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
-using Microsoft.Graph;
 using StatusEnum = Core.Blueprint.Mongo.StatusEnum;
 using UserRequest = Core.Thalos.Domain.Contexts.Onboarding.Request.UserRequest;
 
@@ -54,7 +53,7 @@ namespace LSA.Core.Thalos.API.Controllers
         public async Task<IActionResult> GetUserById([FromRoute] string _id, CancellationToken cancellationToken)
         {
             var result = await service.GetUserById(_id, cancellationToken).ConfigureAwait(false);
-            return result == null ? NotFound("Entity not found") : Ok(result);
+            return result == null ? NotFound("User not found") : Ok(result);
         }
 
         /// <summary>
@@ -171,6 +170,10 @@ namespace LSA.Core.Thalos.API.Controllers
         public async Task<IActionResult> ChangeUserStatus([FromRoute] string _id, [FromRoute] StatusEnum newStatus, CancellationToken cancellationToken)
         {
             var result = await service.ChangeUserStatus(_id, newStatus, cancellationToken).ConfigureAwait(false);
+
+            if (result == null)
+                return NotFound("User not found");
+
             return Ok(result);
         }
 
diff --git a/Core.Thalos.Domain/Core.Thalos.Domain.csproj b/Core.Thalos.Domain/Core.Thalos.Domain.csproj
index 710df0c..d8a522a 100644
--- a/Core.Thalos.Domain/Core.Thalos.Domain.csproj
+++ b/Core.Thalos.Domain/Core.Thalos.Domain.csproj
@@ -8,7 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="Core.Blueprint.KeyVault" Version="1.0.3" />
-    <PackageReference Include="Core.Thalos.BuildingBlocks" Version="1.1.1" />
+    <PackageReference Include="Core.Thalos.BuildingBlocks" Version="1.1.2" />
   </ItemGroup>
 
 </Project>
diff --git a/Core.Thalos.Provider/Contracts/IModuleProvider.cs b/Core.Thalos.Provider/Contracts/IModuleProvider.cs
index d8275cd..5a07f66 100644
--- a/Core.Thalos.Provider/Contracts/IModuleProvider.cs
+++ b/Core.Thalos.Provider/Contracts/IModuleProvider.cs
@@ -62,7 +62,7 @@ namespace Core.Thalos.Provider.Contracts
         /// <returns>
         /// A <see cref="ValueTask{ModuleAdapter}"/> representing the asynchronous execution of the service.
         /// </returns>
-        ValueTask<ModuleAdapter> ChangeModuleStatus(string _id, Blueprint.Mongo.StatusEnum newStatus, CancellationToken cancellationToken);
+        ValueTask<ModuleAdapter?> ChangeModuleStatus(string _id, Blueprint.Mongo.StatusEnum newStatus, CancellationToken cancellationToken);
 
         /// <summary>
         /// Updates a Module by its identifier.
@@ -72,7 +72,7 @@ namespace Core.Thalos.Provider.Contracts
         /// <returns>
         /// A <see cref="ValueTask{ModuleAdapter}"/> representing the asynchronous execution of the service.
         /// </returns>
-        ValueTask<ModuleAdapter> UpdateModule(ModuleAdapter entity, CancellationToken cancellationToken);
+        ValueTask<ModuleAdapter?> UpdateModule(ModuleAdapter entity, CancellationToken cancellationToken);
 
         /// <summary>
         /// Deletes a Module by its identifier.
diff --git a/Core.Thalos.Provider/Contracts/IPermissionProvider.cs b/Core.Thalos.Provider/Contracts/IPermissionProvider.cs
index bfcafe6..fc86211 100644
--- a/Core.Thalos.Provider/Contracts/IPermissionProvider.cs
+++ b/Core.Thalos.Provider/Contracts/IPermissionProvider.cs
@@ -62,7 +62,7 @@ namespace Core.Thalos.Provider.Contracts
         /// <returns>
         /// A <see cref="ValueTask{PermissionAdapter}"/> representing the asynchronous execution of the service.
         /// </returns>
-        ValueTask<PermissionAdapter> ChangePermissionStatus(string _id, Blueprint.Mongo.StatusEnum newStatus, CancellationToken cancellationToken);
+        ValueTask<PermissionAdapter?> ChangePermissionStatus(string _id, Blueprint.Mongo.StatusEnum newStatus, CancellationToken cancellationToken);
 
         /// <summary>
         /// Updates a Permission.
@@ -72,7 +72,7 @@ namespace Core.Thalos.Provider.Contracts
         /// <returns>
         /// A <see cref="ValueTask{PermissionAdapter}"/> representing the asynchronous execution of the service.
         /// </returns>
-        ValueTask<PermissionAdapter> UpdatePermission(PermissionAdapter entity, CancellationToken cancellationToken);
+        ValueTask<PermissionAdapter?> UpdatePermission(PermissionAdapter entity, CancellationToken cancellationToken);
 
         /// <summary>
         /// Deletes a Permission by its identifier.
diff --git a/Core.Thalos.Provider/Contracts/IRoleProvider.cs b/Core.Thalos.Provider/Contracts/IRoleProvider.cs
index 52f5966..bbf25a7 100644
--- a/Core.Thalos.Provider/Contracts/IRoleProvider.cs
+++ b/Core.Thalos.Provider/Contracts/IRoleProvider.cs
@@ -52,7 +52,7 @@ namespace Core.Thalos.Provider.Contracts
         /// <returns>
         /// A <see cref="ValueTask{RoleAdapter}"/> representing the asynchronous execution of the service.
         /// </returns>
-        ValueTask<RoleAdapter> ChangeRoleStatus(string _id, Core.Blueprint.Mongo.StatusEnum newStatus, CancellationToken cancellationToken);
+        ValueTask<RoleAdapter?> ChangeRoleStatus(string _id, Core.Blueprint.Mongo.StatusEnum newStatus, CancellationToken cancellationToken);
 
         /// <summary>
         /// Updates a Role.
@@ -62,7 +62,7 @@ namespace Core.Thalos.Provider.Contracts
         /// <returns>
         /// A <see cref="ValueTask{RoleAdapter}"/> representing the asynchronous execution of the service.
         /// </returns>
-        ValueTask<RoleAdapter> UpdateRole(RoleAdapter entity, CancellationToken cancellationToken);
+        ValueTask<RoleAdapter?> UpdateRole(RoleAdapter entity, CancellationToken cancellationToken);
 
         /// <summary>
         /// Adds an application to the Role's list of applications.
diff --git a/Core.Thalos.Provider/Contracts/ITenantProvider.cs b/Core.Thalos.Provider/Contracts/ITenantProvider.cs
index 85892e8..91a8e6d 100644
--- a/Core.Thalos.Provider/Contracts/ITenantProvider.cs
+++ b/Core.Thalos.Provider/Contracts/ITenantProvider.cs
@@ -52,7 +52,7 @@ namespace Core.Thalos.Provider.Contracts
         /// <returns>
         /// A <see cref="ValueTask{TenantAdapter}"/> representing the asynchronous execution of the service.
         /// </returns>
-        ValueTask<TenantAdapter> ChangeTenantStatus(string _id, Blueprint.Mongo.StatusEnum newStatus, CancellationToken cancellationToken);
+        ValueTask<TenantAdapter?> ChangeTenantStatus(string _id, Blueprint.Mongo.StatusEnum newStatus, CancellationToken cancellationToken);
 
         /// <summary>
         /// Updates a Tenant.
@@ -62,7 +62,7 @@ namespace Core.Thalos.Provider.Contracts
         /// <returns>
         /// A <see cref="ValueTask{TenantAdapter}"/> representing the asynchronous execution of the service.
         /// </returns>
-        ValueTask<TenantAdapter> UpdateTenant(TenantAdapter entity, CancellationToken cancellationToken);
+        ValueTask<TenantAdapter?> UpdateTenant(TenantAdapter entity, CancellationToken cancellationToken);
 
         /// <summary>
         /// Deletes a Tenant by its identifier.
diff --git a/Core.Thalos.Provider/Contracts/IUserProvider.cs b/Core.Thalos.Provider/Contracts/IUserProvider.cs
index 68777f0..915e175 100644
--- a/Core.Thalos.Provider/Contracts/IUserProvider.cs
+++ b/Core.Thalos.Provider/Contracts/IUserProvider.cs
@@ -72,7 +72,7 @@ namespace Core.Thalos.Provider.Contracts
         /// <returns>
         /// A <see cref="ValueTask{UserAdapter}"/> representing the asynchronous execution of the service.
         /// </returns>
-        ValueTask<UserAdapter> ChangeUserStatus(string _id, Blueprint.Mongo.StatusEnum newStatus, CancellationToken cancellationToken);
+        ValueTask<UserAdapter?> ChangeUserStatus(string _id, Blueprint.Mongo.StatusEnum newStatus, CancellationToken cancellationToken);
 
         /// <summary>
         /// Updates a User.
@@ -82,7 +82,7 @@ namespace Core.Thalos.Provider.Contracts
         /// <returns>
         /// A <see cref="ValueTask{UserAdapter}"/> representing the asynchronous execution of the service.
         /// </returns>
-        ValueTask<UserAdapter> UpdateUser(UserAdapter entity, CancellationToken cancellationToken);
+        ValueTask<UserAdapter?> UpdateUser(UserAdapter entity, CancellationToken cancellationToken);
 
         /// <summary>
         /// Logs in the User.
diff --git a/Core.Thalos.Provider/Core.Thalos.Provider.csproj b/Core.Thalos.Provider/Core.Thalos.Provider.csproj
index b5c0c23..23ec797 100644
--- a/Core.Thalos.Provider/Core.Thalos.Provider.csproj
+++ b/Core.Thalos.Provider/Core.Thalos.Provider.csproj
@@ -11,7 +11,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Core.Blueprint.Mongo" Version="1.0.0" />
+    <PackageReference Include="Core.Blueprint.Mongo" Version="1.0.1" />
     <PackageReference Include="Core.Blueprint.Redis" Version="1.0.2" />
     <PackageReference Include="Mapster" Version="7.4.2-pre02" />
   </ItemGroup>
diff --git a/Core.Thalos.Provider/Providers/Onboarding/ModuleProvider.cs b/Core.Thalos.Provider/Providers/Onboarding/ModuleProvider.cs
index 838abf6..4663a20 100644
--- a/Core.Thalos.Provider/Providers/Onboarding/ModuleProvider.cs
+++ b/Core.Thalos.Provider/Providers/Onboarding/ModuleProvider.cs
@@ -131,12 +131,17 @@ namespace Core.Thalos.Provider.Providers.Onboarding
         /// <returns>
         /// A <see cref="ValueTask{ModuleAdapter}"/> representing the asynchronous execution of the service.
         /// </returns>
-        public async ValueTask<ModuleAdapter> ChangeModuleStatus(string _id, StatusEnum newStatus, CancellationToken cancellationToken)
+        public async ValueTask<ModuleAdapter?> ChangeModuleStatus(string _id, StatusEnum newStatus, CancellationToken cancellationToken)
         {
             var entity = await repository.FindByIdAsync(_id);
-            entity.Status = newStatus;
-            await repository.ReplaceOneAsync(entity);
-            return entity;
+
+            if (entity is not null)
+            {
+                entity.Status = newStatus;
+
+                return repository.ReplaceOneAsync(entity).Result;
+            }
+            else return null;
         }
 
         /// <summary>
@@ -147,10 +152,10 @@ namespace Core.Thalos.Provider.Providers.Onboarding
         /// <returns>
         /// A <see cref="ValueTask{ModuleAdapter}"/> representing the asynchronous execution of the service.
         /// </returns>
-        public async ValueTask<ModuleAdapter> UpdateModule(ModuleAdapter entity, CancellationToken cancellationToken)
+        public async ValueTask<ModuleAdapter?> UpdateModule(ModuleAdapter entity, CancellationToken cancellationToken)
         {
-            await repository.ReplaceOneAsync(entity);
-            return entity;
+            var updatedEntity = await repository.ReplaceOneAsync(entity);
+            return updatedEntity;
         }
 
         /// <summary>
diff --git a/Core.Thalos.Provider/Providers/Onboarding/PermissionProvider.cs b/Core.Thalos.Provider/Providers/Onboarding/PermissionProvider.cs
index 5cb2955..fe2780a 100644
--- a/Core.Thalos.Provider/Providers/Onboarding/PermissionProvider.cs
+++ b/Core.Thalos.Provider/Providers/Onboarding/PermissionProvider.cs
@@ -130,12 +130,17 @@ namespace Core.Thalos.Provider.Providers.Onboarding
         /// <returns>
         /// A <see cref="ValueTask{PermissionAdapter}"/> representing the asynchronous execution of the service.
         /// </returns>
-        public async ValueTask<PermissionAdapter> ChangePermissionStatus(string _id, Blueprint.Mongo.StatusEnum newStatus, CancellationToken cancellationToken)
+        public async ValueTask<PermissionAdapter?> ChangePermissionStatus(string _id, Blueprint.Mongo.StatusEnum newStatus, CancellationToken cancellationToken)
         {
             var entity = await repository.FindByIdAsync(_id);
-            entity.Status = newStatus;
-            await repository.ReplaceOneAsync(entity);
-            return entity;
+
+            if (entity is not null)
+            {
+                entity.Status = newStatus;
+
+                return repository.ReplaceOneAsync(entity).Result;
+            }
+            else return null;
         }
 
         /// <summary>
@@ -146,10 +151,10 @@ namespace Core.Thalos.Provider.Providers.Onboarding
         /// <returns>
         /// A <see cref="ValueTask{PermissionAdapter}"/> representing the asynchronous execution of the service.
         /// </returns>
-        public async ValueTask<PermissionAdapter> UpdatePermission(PermissionAdapter entity, CancellationToken cancellationToken)
+        public async ValueTask<PermissionAdapter?> UpdatePermission(PermissionAdapter entity, CancellationToken cancellationToken)
         {
-            await repository.ReplaceOneAsync(entity);
-            return entity;
+            var updatedEntity = await repository.ReplaceOneAsync(entity);
+            return updatedEntity;
         }
 
         /// <summary>
diff --git a/Core.Thalos.Provider/Providers/Onboarding/RoleProvider.cs b/Core.Thalos.Provider/Providers/Onboarding/RoleProvider.cs
index fb24faf..9adfdc7 100644
--- a/Core.Thalos.Provider/Providers/Onboarding/RoleProvider.cs
+++ b/Core.Thalos.Provider/Providers/Onboarding/RoleProvider.cs
@@ -100,13 +100,17 @@ namespace Core.Thalos.Provider.Providers.Onboarding
         /// <returns>
         /// A <see cref="ValueTask{RoleAdapter}"/> representing the asynchronous execution of the service.
         /// </returns>
-        public async ValueTask<RoleAdapter> ChangeRoleStatus(string _id, Blueprint.Mongo.StatusEnum newStatus, CancellationToken cancellationToken)
+        public async ValueTask<RoleAdapter?> ChangeRoleStatus(string _id, Blueprint.Mongo.StatusEnum newStatus, CancellationToken cancellationToken)
         {
             var entity = await repository.FindByIdAsync(_id);
-            entity.Status = newStatus;
 
-            await repository.ReplaceOneAsync(entity);
-            return entity;
+            if (entity is not null)
+            {
+                entity.Status = newStatus;
+
+                return repository.ReplaceOneAsync(entity).Result;
+            }
+            else return null;
         }
 
         /// <summary>
@@ -117,10 +121,10 @@ namespace Core.Thalos.Provider.Providers.Onboarding
         /// <returns>
         /// A <see cref="ValueTask{RoleAdapter}"/> representing the asynchronous execution of the service.
         /// </returns>
-        public async ValueTask<RoleAdapter> UpdateRole(RoleAdapter entity, CancellationToken cancellationToken)
+        public async ValueTask<RoleAdapter?> UpdateRole(RoleAdapter entity, CancellationToken cancellationToken)
         {
-            await repository.ReplaceOneAsync(entity);
-            return entity;
+            var updatedEntity = await repository.ReplaceOneAsync(entity);
+            return updatedEntity;
         }
 
         /// <summary>
diff --git a/Core.Thalos.Provider/Providers/Onboarding/TenantProvider.cs b/Core.Thalos.Provider/Providers/Onboarding/TenantProvider.cs
index 005cf33..b8e4534 100644
--- a/Core.Thalos.Provider/Providers/Onboarding/TenantProvider.cs
+++ b/Core.Thalos.Provider/Providers/Onboarding/TenantProvider.cs
@@ -99,13 +99,17 @@ namespace Core.Thalos.Provider.Providers.Onboarding
         /// <returns>
         /// A <see cref="ValueTask{TenantAdapter}"/> representing the asynchronous execution of the service.
         /// </returns>
-        public async ValueTask<TenantAdapter> ChangeTenantStatus(string _id, Blueprint.Mongo.StatusEnum newStatus, CancellationToken cancellationToken)
+        public async ValueTask<TenantAdapter?> ChangeTenantStatus(string _id, Blueprint.Mongo.StatusEnum newStatus, CancellationToken cancellationToken)
         {
             var entity = await repository.FindByIdAsync(_id);
-            entity.Status = newStatus;
 
-            await repository.ReplaceOneAsync(entity);
-            return entity;
+            if (entity is not null)
+            {
+                entity.Status = newStatus;
+
+                return repository.ReplaceOneAsync(entity).Result;
+            }
+            else return null;
         }
 
         /// <summary>
@@ -116,10 +120,10 @@ namespace Core.Thalos.Provider.Providers.Onboarding
         /// <returns>
         /// A <see cref="ValueTask{TenantAdapter}"/> representing the asynchronous execution of the service.
         /// </returns>
-        public async ValueTask<TenantAdapter> UpdateTenant(TenantAdapter entity, CancellationToken cancellationToken)
+        public async ValueTask<TenantAdapter?> UpdateTenant(TenantAdapter entity, CancellationToken cancellationToken)
         {
-            await repository.ReplaceOneAsync(entity);
-            return entity;
+            var updatedEntity = await repository.ReplaceOneAsync(entity);
+            return updatedEntity;
         }
 
         /// <summary>
diff --git a/Core.Thalos.Provider/Providers/Onboarding/UserProvider.cs b/Core.Thalos.Provider/Providers/Onboarding/UserProvider.cs
index 3f28857..8188bd2 100644
--- a/Core.Thalos.Provider/Providers/Onboarding/UserProvider.cs
+++ b/Core.Thalos.Provider/Providers/Onboarding/UserProvider.cs
@@ -146,14 +146,17 @@ namespace Core.Thalos.Provider.Providers.Onboarding
         /// <param name="newStatus">The new status of the user.</param>
         /// <returns>A <see cref="{Task{UserAdapter}}"/> representing
         /// the asynchronous execution of the service.</returns>
-        public async ValueTask<UserAdapter> ChangeUserStatus(string _id, Core.Blueprint.Mongo.StatusEnum newStatus, CancellationToken cancellationToken)
+        public async ValueTask<UserAdapter?> ChangeUserStatus(string _id, Core.Blueprint.Mongo.StatusEnum newStatus, CancellationToken cancellationToken)
         {
             var entity = await repository.FindByIdAsync(_id);
-            entity.Status = newStatus;
 
-            await repository.ReplaceOneAsync(entity);
+            if (entity is not null)
+            {
+                entity.Status = newStatus;
 
-            return entity;
+                return repository.ReplaceOneAsync(entity).Result;
+            }
+            else return null;
         }
 
         /// <summary>
@@ -163,11 +166,10 @@ namespace Core.Thalos.Provider.Providers.Onboarding
         /// <param name="_id">The User mongo identifier.</param>
         /// <returns>A <see cref="{Task{UserAdapter}}"/> representing
         /// the asynchronous execution of the service.</returns>
-        public async ValueTask<UserAdapter> UpdateUser(UserAdapter entity, CancellationToken cancellationToken)
+        public async ValueTask<UserAdapter?> UpdateUser(UserAdapter entity, CancellationToken cancellationToken)
         {
-            await repository.ReplaceOneAsync(entity);
-
-            return entity;
+            var updatedEntity = await repository.ReplaceOneAsync(entity);
+            return updatedEntity;
         }
 
         /// <summary>