Microsoft Exchange Server 2019 brings a new set of technologies, features, and services to Exchange Server, the messaging platform that provides email, scheduling, and tools for custom collaboration and messaging service applications. Its goal is to support people and organizations as their work habits evolve from a communication focus to a collaboration focus. At the same time, Exchange 2019 helps lower the total cost of ownership whether you deploy Exchange 2019 on-premises or provision your mailboxes in the cloud. When you update to Exchange 2019 Cumulative Update 1 (CU1) from Exchange 2016 RTM, you'll get the following new features: SHA-2 compliant S/MIME in Outlook on the web We've updated the certificate that's used by the S/MIME control in Outlook on the web. The certificate is now SHA-2 compliant. Users who downloaded the control from Exchange 2016 RTM will need to download the control again after you install CU1. Improved download package Exchange 2019 releases, starting with CU1, are now packaged as ISO files instead of a self-extracting EXE file. The ISO file can be mounted directly in Windows Server 2012 or later. If you need to install Exchange across a network, you can create a network share from the mounted ISO drive. Additional languages for Outlook on the web With CU1, we're adding 17 new languages to Outlook on the web. Previous Back