OST Calendars to PST - Version 4.3 OST Calendars to PST software for IT profession because every email stored on the Exchange server and from any region server is crashing at this position make an OST file on client Outlook PST file. OST File to PST Outlook Tool to easily convert and recover OST data into Outlook as mail messages, folders, calendars, contacts, journals and notes) with all its email properties. OST to PST software has some limitation like Outlook is a compulsory store on the PC and most it configure with real account or default account. OST to PST software is quickly done OST Recovery process from damage OST files. And this software successfully works all MS Windows versions. Before purchasing full process version you can use the trial version free of cost and the trial version recover OST calendars to PST but you can't save more than twenty five items per folder. If user wants to save recovered files, then purchase this OST calendar to PST tool at $99. Technical support is available 24x7 for your assistance.