Short description of Stellar Phoenix Mailbox Exchange Desktop 4.5: Stellar Phoenix Mailbox Exchange Desktop- is OST File Recovery Software designed to convert the unusable Microsoft Exchange Offline Storage Files (.OST) file to a Personal Storage File (.PST) file that can be used with Microsoft Outlook. It recovers all components including emails, contacts, notes, and tasks.This Exchange OST File Recovery software is a must have for system administrators and systems maintenance companies.