Here is a quick and dirty way, Run this command from one of your servers.
ldifde -f export.ldf -r "(&(msExchHideFromAddressLists=TRUE)(|(objectClass=user)(objectClass=group)(objectClass=contact)))" -d dc=<yourdomain>,dc=com -l proxyAddresses,mail
Change the -d option to your reflect the DN where you want to start the search, replace the <yourdomain> with your domain name.
This will give you an output of each user, group, and contact object that is hidden. You can remove the attributes you don't want by modifying the -l option.
Good Luck,
Jon