- NT: no URL's in any eventlog messages
  Exchange: an URL in every eventlog message

- NT: a finalised column will cause the record to be deleted
  Exchange: a finalised column will result in a callback being issued

- NT: supports offline upgrade ("esentutl /u")
  Exchange: does not support offline upgrade

- NT: use NT version/build numbers (from ntverp.h)
  Exchange: use Exchange version/build numbers (from exver.h)

- eseVersion