What's the procedure going forward for performing client backup and restore?
This is available now in Server 2016 Essentials and Server by installing the essentials role. This is no longer available in Server 2019.
How do I go about doing this?
To be clear, I don't mean a snapshot full backup, so Windows 7 image backup isn't the answer to the question.
It's more like: how do you do efficient, automated, incremental backups on say a dozen clients in a way that you can bare-metal restore those clients?