The new version number, 15.3, syncs with the latest major version numbers for Outlook's Windows counterpart, which is currently at. The news came in a blog post from the Office 365 team, which promised that the new version would deliver 'improved performance and reliability and a fresh look and feel that is unmistakably Microsoft Office.' The new version requires an Office 365 subscription to be activated. In a surprise announcement today, Microsoft released a new version of Outlook for the Mac.
