Today we’re pleased to announce the commercial previews of Exchange Server 2019 and Skype for Business Server 2019. This announcement adds to the set of commercial previews for Office 2019, which included Office 2019 for Windows and Office 2019 for Mac earlier this year.

Office 365 delivers the most productive and most secure Office experience – with the lowest total cost of ownership for deployment and management. But for customers who aren’t yet ready to move to the cloud, Office 2019 provides an update to the perpetual apps and servers.

Exchange Server 2019
Exchange Server 2019 will support Windows 2019 Server core and allow customers to run Exchange on the most secure Windows operating system to date. In addition, this release will include new and improved search powered by Bing and improved calendaring with features like Do Not Forward and Simplified Calendar Sharing. See what else we’re bringing to Exchange Server 2019 here.

Skype for Business Server 2019
Skype for Business Server 2019 will continue to support on-premises and hybrid customers. This release adds security, quality, and performance features to improve the hybrid scenario, and refreshes mainstream support. New features include Cloud Voicemail, Cloud Org Auto Attendant, Cloud Call Data Connector, and Streamlined Migration to Teams. For more on Skype for Business Server 2019, see our blog post here.

Going forward, we will be investing in and adding new capabilities to Office 365. But we recognize that for many customers, moving to the cloud is a journey with many considerations along the way. Office 2019 will be a valuable upgrade for customers who feel that they need to keep some or all of their apps and servers on-premises.

Source: Office 2019 Server Previews is ready for Commercial customers - Microsoft Tech Community - 218072