Mikey Bronowski continues a series on dbatools:
The built-in feature of the SSMS allows us to configure a group of SQL instances and run queries against multiple instances at once. With the registered servers you can also build a list of SQL Servers in one place, so everyone with access to the CMS can see them. First, we will start by creating registered servers and server groups.
This is an underrated set of functionality for SQL Server and dbatools does a good job working with it.