Office 2019 Professional Plus MSI refers to a specific edition and installation method of Microsoft Office 2019, a suite of productivity applications developed by Microsoft. Office 2019 Professional Plus is a comprehensive package that includes a range of popular Office applications such as Word, Excel, PowerPoint, Outlook, Access, Publisher, and OneNote. This edition is targeted towards businesses, organizations, and power users who require advanced features and functionality. Get the best deals from DirectDeals. Call us on (800) 983-2471 for more details.