ExchangeRecovery - Version 1.0.02 ExchangeRecovery is a data recovery program for Microsoft Exchange Server. In case of server crash or deleting a mailbox, Offline Storage Files (.ost) remain on client computer, holding emails, contacts, tasks and other items from the original mail account. ExchangeRecovery converts these files to more common Personal Storage File (.pst) format to be read with Outlook or other compatible mail client. Supports Exchange 95/98/2000.