diff --git a/addons/calendar/models/calendar_attendee.py b/addons/calendar/models/calendar_attendee.py
index 19148fd2ba6..dca29b1693e 100644
--- a/addons/calendar/models/calendar_attendee.py
+++ b/addons/calendar/models/calendar_attendee.py
@@ -57,7 +57,9 @@ class Attendee(models.Model):
     @api.model_create_multi
     def create(self, vals_list):
         for values in vals_list:
-            if not values.get('state') and values.get('partner_id') == self.env.user.partner_id.id:
+            # by default, if no state is given for the attendee corresponding to the current user
+            # that means he's the event organizer so we can set his state to "accepted"
+            if 'state' not in values and values.get('partner_id') == self.env.user.partner_id.id:
                 values['state'] = 'accepted'
             if not values.get("email") and values.get("common_name"):
                 common_nameval = values.get("common_name").split(':')
diff --git a/addons/calendar/models/calendar_event.py b/addons/calendar/models/calendar_event.py
index bb6230b7738..07ccd0ba0d1 100644
--- a/addons/calendar/models/calendar_event.py
+++ b/addons/calendar/models/calendar_event.py
@@ -389,10 +389,14 @@ class Meeting(models.Model):
                     activity_vals['user_id'] = user_id
                 values['activity_ids'] = [(0, 0, activity_vals)]
 
+        # Add commands to create attendees from partners (if present) if no attendee command
+        # is already given (coming from Google event for example).
         # Automatically add the current partner when creating an event if there is none (happens when we quickcreate an event)
         default_partners_ids = defaults.get('partner_ids') or ([(4, self.env.user.partner_id.id)])
         vals_list = [
-            dict(vals, attendee_ids=self._attendees_values(vals.get('partner_ids', default_partners_ids))) if not vals.get('attendee_ids') else vals
+            dict(vals, attendee_ids=self._attendees_values(vals.get('partner_ids', default_partners_ids)))
+            if not vals.get('attendee_ids')
+            else vals
             for vals in vals_list
         ]
         recurrence_fields = self._get_recurrent_fields()
diff --git a/addons/calendar/tests/test_attendees.py b/addons/calendar/tests/test_attendees.py
index 8abba50f986..48a9ef0ca2f 100644
--- a/addons/calendar/tests/test_attendees.py
+++ b/addons/calendar/tests/test_attendees.py
@@ -36,6 +36,28 @@ class TestEventNotifications(TransactionCase):
         self.assertEqual(event.attendee_ids.partner_id, self.partner, "It should be linked to the partner")
         self.assertIn(self.partner, event.message_follower_ids.partner_id, "He should be follower of the event")
 
+    def test_attendee_added_create_with_specific_states(self):
+        """
+        When an event is created from an external calendar account (such as Google) which is not linked to an
+        Odoo account, attendee info such as email and state are given at sync.
+        In this case, attendee_ids should be created accordingly.
+        """
+        organizer_partner = self.env['res.partner'].create({'name': "orga", "email": "orga@google.com"})
+        event = self.env['calendar.event'].with_user(self.user).create({
+            'name': "Doom's day",
+            'start': datetime(2019, 10, 25, 8, 0),
+            'stop': datetime(2019, 10, 27, 18, 0),
+            'attendee_ids': [
+                (0, 0, {'partner_id': self.partner.id, 'state': 'needsAction'}),
+                (0, 0, {'partner_id': organizer_partner.id, 'state': 'accepted'})
+            ],
+            'partner_ids': [(4, self.partner.id), (4, organizer_partner.id)],
+        })
+        attendees_info = [(a.email, a.state) for a in event.attendee_ids]
+        self.assertEqual(len(event.attendee_ids), 2)
+        self.assertIn((self.partner.email, "needsAction"), attendees_info)
+        self.assertIn((organizer_partner.email, "accepted"), attendees_info)
+
     def test_attendee_added_multi(self):
         event = self.env['calendar.event'].create({
             'name': "Doom's day",