diff --git a/Idone/Idone.Back/Startup.cs b/Idone/Idone.Back/Startup.cs
index fa64200..42eb535 100644
--- a/Idone/Idone.Back/Startup.cs
+++ b/Idone/Idone.Back/Startup.cs
@@ -36,7 +36,7 @@ public void ConfigureServices(IServiceCollection services)
             services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2).Services
                     .AddIdoneIdentity()
                     .AddIdoneDb(connString)
-                    .AddSecurityDi();
+                    .AddSecurityDi(Configuration);
         }
     }
 }
\ No newline at end of file
diff --git a/Idone/Idone.Back/appsettings.Development.json b/Idone/Idone.Back/appsettings.Development.json
index 5e66f3b..93bea0c 100644
--- a/Idone/Idone.Back/appsettings.Development.json
+++ b/Idone/Idone.Back/appsettings.Development.json
@@ -8,5 +8,8 @@
     },
     "ConnectionStrings": {
         "default": "Server=(localdb)\\mssqllocaldb;Database=Idone;Trusted_Connection=True;ConnectRetryCount=0;"
+    },
+    "ActiveDirectory": {
+        "domain": "tomskasu"
     }
 }
diff --git a/Idone/Idone.Security/SecurityApp.cs b/Idone/Idone.Security/SecurityApp.cs
index 8d2c304..144f608 100644
--- a/Idone/Idone.Security/SecurityApp.cs
+++ b/Idone/Idone.Security/SecurityApp.cs
@@ -2,6 +2,7 @@
 {
     using Idone.Security.Services;
 
+    using Microsoft.Extensions.Configuration;
     using Microsoft.Extensions.DependencyInjection;
 
     /// <summary>
@@ -14,10 +15,13 @@ public static class SecurityApp
         /// </summary>
         /// <param name="services"> Сервисы. </param>
         /// <returns> Возвращает сервисы. </returns>
-        public static IServiceCollection AddSecurityDi(this IServiceCollection services)
+        public static IServiceCollection AddSecurityDi(this IServiceCollection services, IConfiguration config)
         {
+            //TODO: при разрастании параметров выделить в отдельный класс десериализации настроек
+            var adDomain = config.GetSection("ActiveDirectory").GetSection("domain").Value;
+
             services.AddScoped<UserService>();
-            services.AddScoped<AdService>();
+            services.AddScoped(s => new AdService(adDomain));
 
             return services;
         }
diff --git a/Idone/Idone.Security/Services/AdService.cs b/Idone/Idone.Security/Services/AdService.cs
index d49861a..c3c0294 100644
--- a/Idone/Idone.Security/Services/AdService.cs
+++ b/Idone/Idone.Security/Services/AdService.cs
@@ -1,8 +1,10 @@
 namespace Idone.Security.Services
 {
+    using System;
     using System.Collections.Generic;
     using System.DirectoryServices.AccountManagement;
     using System.Linq;
+    using System.Net;
 
     using Idone.DAL.Dictionaries;
     using Idone.DAL.DTO;
@@ -18,7 +20,28 @@ namespace Idone.Security.Services
     /// </summary>
     internal class AdService
     {
-        private const string DOMAIN = "tomskasu";
+        /// <summary>
+        /// Домен сервиса Active Directory. 
+        /// </summary>
+        private readonly string _domain;
+
+        /// <summary>
+        /// Инициализировать зависимости.
+        /// </summary>
+        /// <param name="domain">Домен сервиса Active Directory.</param>
+        public AdService(string domain)
+        {
+            if (string.IsNullOrEmpty(domain))
+            {
+                throw new NullReferenceException($"Пустой аргумент {nameof(domain)}");
+            }
+            if (!Dns.GetHostAddresses(domain).Any())
+            {
+                var msg = $"Не найден домен сервиса Active Directory для переданного аргумента {nameof(domain)}";
+                throw new ArgumentException(msg);
+            }
+            _domain = domain;
+        }
 
         /// <summary>
         /// Найти пользователей по отображаемому имени.
@@ -27,8 +50,7 @@ internal class AdService
         /// <returns> Возращает монаду с найденными совпадениями пользователей по отображаемому имени. </returns>
         public Either<Error, IEnumerable<DtoAdUser>> FindUsersByDisplayName(string searchExpression)
         {
-            //TODO: вынести домен в настройки
-            using (var ctx = new PrincipalContext(ContextType.Domain, DOMAIN))
+            using (var ctx = new PrincipalContext(ContextType.Domain, _domain))
             using (var query = new UserPrincipal(ctx)
             {
                 DisplayName = searchExpression
@@ -57,7 +79,7 @@ internal class AdService
         /// <returns>Результат операции.</returns>
         public Either<Error, Success> CreateUser(DtoNewAdUser newUser)
         {
-            using (var ctx = new PrincipalContext(ContextType.Domain, DOMAIN))
+            using (var ctx = new PrincipalContext(ContextType.Domain, _domain))
             using (var query = new UserPrincipal(ctx))
             {
                 query.SamAccountName = newUser.Nickname;
diff --git a/Idone/Idone.Tests/appsettings.Development.json b/Idone/Idone.Tests/appsettings.Development.json
index 77f9978..d04f5e0 100644
--- a/Idone/Idone.Tests/appsettings.Development.json
+++ b/Idone/Idone.Tests/appsettings.Development.json
@@ -8,5 +8,8 @@
     },
     "ConnectionStrings": {
         "default": "Server=172.17.0.3,1433;Database=Idone.Tests;User ID=SA;pwd=<qweQWE1234>;Trusted_Connection=False;"
+    },
+    "ActiveDirectory": {
+        "domain": "tomskasu"
     }
-}
+}
\ No newline at end of file