Try STELLAOST to PST converter software to convert all the ost file data in to pstfile. Stella ost to pst converter software support all the versions of theexchange ost file. Stella ost to pst converter softwareconverts all the ost items into office 365 account. Ost to pst convertersoftware converts all the ost items into eml file, msg file, mbox file, mhtmlfile. demo version of the software converts 25 emails in each folder.
Formore info visit this link