Download software and use it for recovery and conversion of outlook ost file to pst .
Sifo systems ost to pst software support all version of outlook ost file that are ost 2016,ost 2013,ost 2010,ost 2007,ost 2003,etc .
Go for free download software ,click here :- crunchbase.com/organization/sifo-systems-ost-to-pst-converter-software
(copy and paste this link to new tab and get free download of software)