By default, when a user logs on to a server, the Server Manager application is launched. This can be disabled for each user via Server Manager properties. If we have 100 servers and many admins it will be a lot of work to disable it on every server.
You can disable it manually by clicking on Manage –> Server Manager Properties
And selecting Do not start Server Manager….
To disable it for all servers and all users open a Group Policy Object (GPO), I will modify Default Domain Policy, and navigate to Computer Configuration, Policies, Administrative Templates, System, Server Manager.
Double-Click on Do not display Server Manager auto…and enable it.
Once done, click Apply and OK
Close the Group Policy Management Editor.