/// <summary>
        /// Creates user.
        /// </summary>
        /// <param name="name">User name.</param>
        /// <returns>Newly created user.</returns>
        public IPrincipal CreatePrincipal(string name)
        {
            if (!PrincipalBase.IsValidUserName(name))
            {
                throw new DavException("User name contains invalid characters", DavStatus.FORBIDDEN);
            }

            var userPrincipal = new UserPrincipal(Context.GetPrincipalContext());

            userPrincipal.Name = name;
            userPrincipal.UserPrincipalName = name;

            userPrincipal.Enabled = true;
            userPrincipal.ExpirePasswordNow();

            Context.PrincipalOperation(userPrincipal.Save);

            return new User(userPrincipal, Context);
        }