OST to PST Tool - Version 3.5 OST to PST Tool provides best services to recovers your corrupted or broken OST file and its ability to work offline modes. OST to PST Converter application provides best options to save the recovers items in OST, PST and EML layout. Some time outlook users facing problem with exchange server due to many reasons like as: system shut down, user account failure etc. in this case OST PST Tool simply gives a chance to recovers your all OST data items. Free OST to PST Tool works as Microsoft outlook editions like as 2010, 2007, 2003, 2000 and 98. Full version online available invest at a low price just at $99.