The first step in recovering mailboxes from a corrupted Exchange Server database is typically to use the Exchange utility eseutil /mh to examine the database state. It may be safer and more efficient to use a professional recovery program when the mailboxes cannot be recovered by the native utilities or when the database is seriously compromised. Gaintools EDB to PST Converter, for instance, can handle corrupted or dismounted EDB files and retrieve mailbox data straight into PST format. This enables administrators to import the PST files back into Outlook or Exchange without changing the original database after recovering emails, contacts, calendars, and other mailbox objects.