Exchange Server 2019 lets you accomplish more with rich Outlook experiences on phones, tablets, desktops, and the Web. Exchange integration with Outlook, SharePoint, and OneDrive for Business helps you experience better collaboration when sharing documents. Exchange Server 2019 is designed to deliver security, performance, and improved administration and management capabilities. It will let you accomplish more with new capabilities including improved search powered by Bing, improved calendaring with features like Do Not Forward, and simplified Calendar Sharing.
A Client Access License (CAL) is required for each device that accesses the server software. Please purchase the appropriate number of device CALs for each user or device that accesses the server.