import arcpy, os, sys
relpath = os.path.dirname(sys.argv[0])

p = arcpy.mp.ArcGISProject("C:\Automation\Automation.aprx")
print ("project located")
l = p.listLayouts()[0]
print ("layouts listed")
if not l.mapSeries is None:
  ms = l.mapSeries
  if ms.enabled:
    for pageNum in range(1, ms.pageCount + 1):
      ms.currentPageNumber = pageNum
      print("Exporting page {0} of {1}".format(str(ms.currentPageNumber), str(ms.pageCount)))
      l.exportToPDF("C:\Users\Default\Production\Completed_certificates\Exported_PDF_file_{0}".format(str(ms.currentPageNumber) + ".pdf"))