is there a way to know if someone released/deleted quarantine?

The number one complaint I get is "I clicked 'release' on a quarantine email and it never showed up"

Is there a way to find out if they really did click release or if they accidentally clicked delete? and when it was logged so I can check the email server logs? I cannot find any way to get a log of what happened in the Fortimail.

I'm using a Fortimail 100 with 4.0MR3

Mark