diff --git a/gestion/lib/Db/Bdd.php b/gestion/lib/Db/Bdd.php
index 561a014..135fabe 100644
--- a/gestion/lib/Db/Bdd.php
+++ b/gestion/lib/Db/Bdd.php
@@ -1884,6 +1884,40 @@ class Bdd {
         return "";
     }
 
+    public function getCalendarOrganizerNameByCalendarObjectUuid(string $calendarObjectUuid){
+        $calendarObject = $this->getCalendarObjectByUuid($calendarObjectUuid);
+        if($calendarObject != null){
+            $calendar = $this->getCalendarById($calendarObject['calendarid']);
+            if($calendar != null){
+                $principalUri = $calendar["principaluri"];
+                $organizerName = str_replace('principals/users/','',$principalUri);
+                $organizerName = trim($organizerName);
+                return $organizerName;
+            }
+        }
+        return null;
+    }
+
+    public function getCalendarObjectByUuid(string $calendarObjectUuid){
+        $sql = "SELECT * FROM ".self::CALENDAR_TABLE_PREFIX."calendarobjects WHERE uid = ?;";
+        $calendarObjectList = $this->execSQLNoJsonReturn($sql, [$calendarObjectUuid]);
+        if(!empty($calendarObjectList)){
+            $calendarData = $calendarObjectList[0];
+            return $calendarData;
+        }
+        return null;
+    }
+
+    public function getCalendarById(int $calendarId){
+        $sql = "SELECT * FROM ".self::CALENDAR_TABLE_PREFIX."calendars WHERE id = ?;";
+        $calendarList = $this->execSQLNoJsonReturn($sql, [$calendarId]);
+        if(!empty($calendarList)){
+            $calendarData = $calendarList[0];
+            return $calendarData;
+        }
+        return null;
+    }
+
     /**
 	 * @param $calendarData
 	 * @return bool|string
diff --git a/gestion/lib/Service/GestionService.php b/gestion/lib/Service/GestionService.php
index c7de3e4..d0fabe3 100644
--- a/gestion/lib/Service/GestionService.php
+++ b/gestion/lib/Service/GestionService.php
@@ -65,6 +65,17 @@ class GestionService {
                 $thanatoId = $thanatoIdFromDb;   
             }
         }
+        else{
+            //get from calendar object
+            $calendarUuid = VCalendarHelpers::GetValueFromKeyInVCalendarString("UID", $vCalendarString);
+            $organizerName = $this->gestionBdd->getCalendarOrganizerNameByCalendarObjectUuid($calendarUuid);
+            if($organizerName != null){
+                $thanatoIdFromDb = $this->gestionBdd->getFirstThanatoIdByName($organizerName);
+                if($thanatoIdFromDb != null){
+                    $thanatoId = $thanatoIdFromDb;   
+                }
+            }
+        }
         return $thanatoId;
     }
     private function GetAttendeesNameFromVCalendarString(string $vCalendarString): array