if !sys.Initialized() {
		err = errServerNotInitialized
		return
	}

	userOrGroup := r.User
	var isGroup bool
	if userOrGroup == "" {
		isGroup = true
		userOrGroup = r.Group
	}

	if isGroup {
		_, err = sys.GetGroupDescription(userOrGroup)
		if err != nil {
			return
		}
	} else {
		var isTemp bool

	loadMappedPolicy(ctx context.Context, name string, userType IAMUserType, isGroup bool, m *xsync.MapOf[string, MappedPolicy]) error
	loadMappedPolicyWithRetry(ctx context.Context, name string, userType IAMUserType, isGroup bool, m *xsync.MapOf[string, MappedPolicy], retries int) error
	loadMappedPolicies(ctx context.Context, userType IAMUserType, isGroup bool, m *xsync.MapOf[string, MappedPolicy]) error

	if objectAPI == nil {
		return
	}

	vars := mux.Vars(r)
	policyName := vars["policyName"]
	entityName := vars["userOrGroup"]
	isGroup := vars["isGroup"] == "true"

	if !isGroup {
		ok, _, err := globalIAMSys.IsTempUser(entityName)
		if err != nil && err != errNoSuchUser {
			writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
			return
		}

	if err != nil {
		return np, grid.NewRemoteErr(fmt.Errorf("user-type `%s` is invalid: %w", mss.Get(peerRESTUserType), err))
	}

	isGroup := mss.Get(peerRESTIsGroup) == "true"
	if err := globalIAMSys.LoadPolicyMapping(context.Background(), objAPI, userOrGroup, IAMUserType(userType), isGroup); err != nil {
		return np, grid.NewRemoteErr(err)
	}

	return
}