Use the Sysinspire OST to PST file Converter software to convert the outlook OST file into lotus notes. It allows you to split the OST file into a small PST file and This software converts the OST file from the exchange environment of office 365, outlook.com and IMAP. You can use it for a free demo and save 25 items from each and every folder of the OST mailbox. Outlook installation is not not required during the conversion. Free Download this software without any restriction.