OST to PST Microsoft - Version 3.3 OST to PST Microsoft tool to design with advance technology and concept of OST to PST conversion process. OST (offline storage file) is duplicate copy of mailbox stored on exchange server it contains data like email with contact, address, calendar with fixed appointment, note to do, deleted item, inbox data get synchronized and saved in hard drive it is unusable then OST to PST Microsoft tools simply convert OST data to .PST .EML and .MSG file format. OST to PST Microsoft Outlook supports all windows version such as 98/2000/2003/XP/Vista and Win7. User can purchase of this OST to PST Microsoft tool at only at $99. For more details visit this link: - http://www.microsoftosttopst.com