I have a client with multiple mailboxes.  One user keeps losing their email.  The problem is further complicated by having 2 users using the same email - which I strongly suggest they change but they like having 1 email address for each office location.  

 

So my question is this.  Is there a way to know if that user on the other end of things is simply deleting the emails?  Nothing is showing up in the deleted items box, but the user could simply be deleting the contents of the deleted items box.  

 

Is there a log I can enable that would show that level of user activity?  My client suspects possible hanky-panky at the remote location or a problem with SmarterMail.

 

How do I prove SmarterMail is fine?