Windows Server 2012’s Server Manager provides an easy and effective method for managing multiple servers running Windows Server 2008, 2008 R2, 2012 and 2012 R2 servers from a single console. By enabling Remote Management, all of your servers can be added to a single instance of Server Manager. From this single console you can then add roles and features, view events and manage many of the roles and services to any of your servers.
For environments containing many servers, you can choose to leverage the Server Manager feature called Server Groups. By creating and adding servers to Server Groups you can organize them by any method you choose thereby making it easier to locate and manage your servers.
If your server and client environment includes HyperV virtual machines you can also use Server Manager to deploy roles and features to virtual hard drives (vhd and vhdx).
Additionally, the MMC snap-ins that you commonly use to manage many of the server roles are part of the Remote Server Administration Tools. RSAT is a Windows Server 2012 feature that can also be downloaded and installed in Windows 8 clients. Many of the RSAT MMC snap-ins can be redirected to connect to a remote server.
Using Server Manager and RSAT to manage your server can increase your efficiency and more importantly increase server security by greatly reducing the need to login locally or remotely to your servers using an admin or domain admin account. For more information about Server Manager and RSAT, review this Technet article: Manage Multiple, Remote Servers with Server Manager.