Having only just stumbled across this aspect of SBS due to my manager forwarding me a report, I've noticed that the emails sent/received are incorrect by a huge amount. Over a 2 week period, apparently I've only sent 3 emails from my Exchange account. I know this figure is hugely wrong. It's not just myself, it's every account we have here that's showing very small amounts of emails being sent. I've checked the Exchange logs and these show what I would be expecting.
Does anyone have any ideas as to what might be causing this? If you need any more info, please let me know so I can have a look as I inherited this server, not set it up (unfortunately).