diff --git a/addons/microsoft_calendar/utils/microsoft_calendar.py b/addons/microsoft_calendar/utils/microsoft_calendar.py
index b22cb2866cd..db91998a451 100644
--- a/addons/microsoft_calendar/utils/microsoft_calendar.py
+++ b/addons/microsoft_calendar/utils/microsoft_calendar.py
@@ -61,7 +61,7 @@ class MicrosoftCalendarService():
             end_date = self.microsoft_service._context.get('range_end_date')
             if start_date and end_date:
                 start_date = start_date.strftime("%Y-%m-%dT00:00:00Z")
-                end_date = end_date.strftime("%Y-%m-%dT00:00:00Z")
+                end_date = fields.Datetime.add(end_date, days=1).strftime("%Y-%m-%dT00:00:00Z")
             else:
                 ICP = self.microsoft_service.env['ir.config_parameter'].sudo()
                 day_range = int(ICP.get_param('microsoft_calendar.sync.range_days', default=365))
@@ -110,6 +110,20 @@ class MicrosoftCalendarService():
                 return self._get_events_delta(token=token, timeout=timeout)
             raise e
 
+        # update sync min and max date range after retrieving occurrences, they must be entirely created once
+        # otherwise we would have to retrieve everytime all occurrences from all recurrences in _get_occurrence_details
+        min_start_dt = self.microsoft_service._context.get('range_start_date')
+        max_stop_dt = self.microsoft_service._context.get('range_end_date')
+        for event in events:
+            if event.get('type') == 'occurrence' and event.get('start') and event.get('stop'):
+                # get time values and update min start and max stop from sync context range
+                time_values = self.microsoft_service.env['calendar.event']._microsoft_to_odoo_recurrence_values(MicrosoftEvent([event]))
+                if not min_start_dt or time_values['start'] < min_start_dt:
+                    min_start_dt = time_values['start']
+                if not max_stop_dt or time_values['stop'] > max_stop_dt:
+                    max_stop_dt = time_values['stop']
+        self.microsoft_service = self.microsoft_service.with_context(range_start_date=min_start_dt, range_end_date=max_stop_dt)
+
         # event occurrences (from a recurrence) are retrieved separately to get all their info,
         # # and mainly the iCalUId attribute which is not provided by the 'get_delta' api end point
         events = [e for e in events if e.get('type') != 'occurrence']