Use more updated OST to PST Freeware tool, to recover Exchange mailbox from OST file. Tool can recover the unlimited OST database (up to Terabytes). The user can't be stuck in any doubt regarding the procedure to convert OST file to PST format. Tool can recover email from OST file whether these OST emails are in encrypted or password protected format. Tool is supportable to multiple OST and PST versions. User can also convert OST file in PST format in the healthy Exchange environment. You can recover deleted email from OST file from the deleted folder with selection facility. For more information regarding the tool, you can download its trial version that is available free of cost. http://www.bouncersdelhi.com/recommended/convert-ost-file-to-pst/