Office 365 ProPlus, the cloud-connected version of Office, delivers the most productive and most secure Office experience—with the lowest total cost of ownership for deployment and management. However, for customers who aren’t ready for the cloud, Office 2016-2019 provides new features and updates to the on-premises apps for both users and IT professionals. Like Windows Long Term Servicing Channel (LTSC) releases, Office 2021 provides a set of valuable enhancements for customers who can’t be cloud-connected or receive regular updates.