The Outlook OST to PST Convertersoftware is the reasonable key & masterly system of working solution convert OST to PST file with all emails properties & mailbox attachmnets. by helping this application you can split large PST file (25GB). Through this utility all Outlook OST users can easily transfer & save inaccessible offline OST items into PST, Zimbra, Office 365, Live Exchange, and vCard/vCal, MSG, EML/EMLX, and MBOX etc. I would also recommend you download a free trial version of this software to check out its working ability and features.