diff --git a/fuel_health/config.py b/fuel_health/config.py
index a2b17a08..ff434c12 100644
--- a/fuel_health/config.py
+++ b/fuel_health/config.py
@@ -782,9 +782,13 @@ class NailgunConfig(object):
                 insecure=False,
                 timeout=10)
             return ip
-        except Exception:
+        except (keystoneclient.exceptions.AuthorizationFailure,
+                keystoneclient.exceptions.Unauthorized):
+            raise exceptions.InvalidCredentials
+        except Exception as e:
             LOG.warning('Can not pass authorization '
-                        'with proxy on {0}'.format(ip))
+                        'with proxy on {0}, error: {1}'
+                        .format(ip, e))
             LOG.debug(traceback.format_exc())
 
     def set_proxy(self):
diff --git a/fuel_health/exceptions.py b/fuel_health/exceptions.py
index 858c3d0d..0ca15612 100644
--- a/fuel_health/exceptions.py
+++ b/fuel_health/exceptions.py
@@ -51,6 +51,14 @@ class InvalidConfiguration(FuelException):
     message = "Invalid Configuration"
 
 
+class InvalidCredentials(InvalidConfiguration):
+    message = (
+        "Authorization failure. "
+        "Please provide the valid credentials for your OpenStack environment, "
+        "and reattempt."
+    )
+
+
 class SetProxy(InvalidConfiguration):
     message = ("Can not set proxy for Health Check."
                "Make sure that network configuration "
diff --git a/fuel_health/nmanager.py b/fuel_health/nmanager.py
index a485f6c6..6f39623a 100644
--- a/fuel_health/nmanager.py
+++ b/fuel_health/nmanager.py
@@ -84,17 +84,15 @@ class OfficialClientManager(fuel_health.manager.Manager):
             self.identity_client = self._get_identity_client()
             self.identity_v3_client = self._get_identity_client(version=3)
             self.clients_initialized = True
+        except (keystoneclient.exceptions.AuthorizationFailure,
+                keystoneclient.exceptions.Unauthorized):
+            self.keystone_error_message = \
+                exceptions.InvalidCredentials.message
         except Exception as e:
-            if e.__class__.__name__ == 'Unauthorized':
-                self.keystone_error_message = ('Unable to run test: OpenStack'
-                                               ' Authorization Failure. '
-                                               'If login or '
-                                               'password was changed, '
-                                               'please update '
-                                               'environment settings. '
-                                               'Please refer to Mirantis '
-                                               'OpenStack documentation '
-                                               'for more details.')
+            LOG.error(
+                "Unexpected error durring intialize keystoneclient: {0}"
+                .format(e)
+            )
             LOG.debug(traceback.format_exc())
             self.traceback = traceback.format_exc()