We are using Live@edu, which is essentially hosted exchange server with some additional features and limitations to work around, and I'm trying to find everybody that is forwarding or redirecting emails from their accounts.

I am trying to remove old accounts that have not been used, but we have instructions for users on redirecting emails, so we should expect that some users are indeed redirecting their emails, which will make their last login/logoff times not reflect whether they are indeed using auto forwarding or auto redirecting rules.

How could I find a list of users with forwarding or redirection rules using Exchange 2010 Powershell Cmdlets?

/EDIT: It may be sufficient for my purposes to find whether there are ANY server side rules, regardless of whether the rule forwards/redirects or does some other action.