how can I track the username of the user who deleted or moved email from shared mail

Question

Hi Guys,    I came into situation something like this as mentioned below and need to program accordingly.   There is one shared Inbox, on which different people work together.    So how can I track the username of the user who deleted or moved email from shared mail.    Can you please provide some link or idea, i tried finding in Google bit didn't get any useful material?