C'est bon j'ai réussi via :
Private Sub Workbook_Open()
Sheets("RECENSEMENT").Select
ActiveWorkbook.RefreshAll
Application.OnTime Now + TimeValue("00:05:00"), "enregistrement"
Application.OnTime Now + TimeValue("01:00:00"), "actualisation"
End Sub
+
Sub enregistrement()
Application.DisplayAlerts = False
DoEvents
ThisWorkbook.Save
Application.OnTime Now + TimeValue("00:05:00"), "enregistrement"
End Sub
+
Sub actualisation()
Sheets("RECENSEMENT").Select
ActiveWorkbook.RefreshAll
Application.OnTime Now + TimeValue("01:00:00"), "actualisation"
End Sub