Some users searching for the best tool to Restore OST file to PST. I suggest those users download and install Enstella OST to PST Converter Software. It can smoothly convert OST files to Mbox, PST, Office 365, EML, HTML, EMLX, MBOX, MSG, VCF, CSV, Yahoo Mail, IMAP Account, Zimbra Desktop, and 13+ other formats without any problems. It provides technical support 24/7 with emails and live chats.