excelObject.DisplayAlerts = False
Set excelObject = CreateObject("Excel.Application")
excelObject.DisplayAlerts = False
Set wb = excelObject.Workbooks.Add
fullFilePath = importFolderPath & "\" & "A.xlsx"
wb.SaveAs fullFilePath, AccessMode:=xlExclusive,ConflictResolution:=Excel.XlSaveConflictResolution.xlLocalSessionChanges
wb.Close (True)
https://stackoverflow.com/questions/14634453/how-to-use-workbook-saveas-with-automatic-overwrite