Andrea Allred creates a local server group:
In the past, I have talked about CMS (Central Management Servers), but now I don’t have CMS configured and still want to query multiple instances at once. Local Server Groups are my friend.
My preference is CMS, especially as the number of data platform professionals increases. Keeping track of all of those new instances can be a pain otherwise. But if you’re in an environment in which that’s not an option, local server groups provide a reasonable alternative.