internal class AccountMembershipService : IMembershipService
    {
        private readonly ActiveDirectoryMembershipProvider _provider;

        public AccountMembershipService()
            : this(null)
        {
        }

        public AccountMembershipService(ActiveDirectoryMembershipProvider provider)
        {
            _provider = provider ?? (ActiveDirectoryMembershipProvider)Membership.Provider;
        }

        public bool ValidateUser(string userName, string password)
        {
            return _provider.ValidateUser(userName, password);
        }
    }

<configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <connectionStrings>
    <add name="ADConnectionString" connectionString="LDAP://local/DC=Служебные учетки" />
  </connectionStrings>
  <appSettings>
    <add key="webpages:Version" value="2.0.0.0" />
    <add key="webpages:Enabled" value="false" />
    <add key="PreserveLoginUrl" value="true" />
    <add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />
    <add key="enableSimpleMembership" value="false"/>
    <add key="autoFormsAuthentication" value="false"/>
  </appSettings>
  <system.web>
    <compilation debug="true" targetFramework="4.5"><assemblies><add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" /></assemblies></compilation>
    <httpRuntime targetFramework="4.5" />
    <membership defaultProvider="ADMembershipProvider">
      <providers>
        <clear />
        <add name="ADMembershipProvider" type="System.Web.Security.ActiveDirectoryMembershipProvider" 
              connectionStringName="ADConnectionString" 
              connectionUsername="itilium_web" 
              connectionPassword="@itilium_web@2013" 
              enablePasswordReset="false"
              attributeMapUsername="sAMAccountName" />
      </providers>
    </membership>
    <authentication mode="Forms">
      <forms name=".ADAuthCookie" loginUrl="~/Account/Login" timeout="4880" />
    </authentication>
    <authorization>
      <deny users="?" />
      <allow users="*" />
    </authorization>