diff --git a/data/users/externalldap.py b/data/users/externalldap.py
index 2417584f5..60c69a2b0 100644
--- a/data/users/externalldap.py
+++ b/data/users/externalldap.py
@@ -107,11 +107,11 @@ class LDAPUsers(FederatedUsers):
         subquery = u'(%s=%s)' % (self._uid_attr, username_or_email)
         return (conn.search_s(referral_dn, ldap.SCOPE_BASE, subquery), None)
       except ldap.LDAPError:
-        logger.exception('LDAP referral search exception')
+        logger.debug('LDAP referral search exception')
         return (None, 'Username not found')
 
     except ldap.LDAPError:
-      logger.exception('LDAP search exception')
+      logger.debug('LDAP search exception')
       return (None, 'Username not found')
 
   def _ldap_user_search(self, username_or_email, limit=20):
@@ -234,11 +234,11 @@ class LDAPUsers(FederatedUsers):
                             self._allow_tls_fallback):
           pass
       except ldap.INVALID_CREDENTIALS:
-        logger.exception('Invalid LDAP credentials')
+        logger.debug('Invalid LDAP credentials')
         return (None, 'Invalid password')
 
     except ldap.INVALID_CREDENTIALS:
-      logger.exception('Invalid LDAP credentials')
+      logger.debug('Invalid LDAP credentials')
       return (None, 'Invalid password')
 
     return self._credential_for_user(found_response)