We are running Exchange 2010 SP 2. We have 4 mailbox databases on a single drive that is 709 GB. We only have 60 GB of freespace. Mailboxes do not have any limitations and some are 10 GB. Users have been asked to clean up the mailboxes to reduce the size and many have. Cleanup includes empty the trash and delete recoverable items. But I don't see the free space increasing. Is there something else that needs to be done?