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When you boot Windows Server 2012 RC for the first time, you'll see Server Manager, ready for you to configure your server. Server Manager, which is where you'll spend most of your time (unless you're using RSAT to control Server Core installations), wraps a set of PowerShell management tools in a Metro user interface.
Screenshots: Simon Bisson/ZDNet UK
Although you can add features to Windows Server 2012 one at a time, it's a lot easier to use the Add Role tool to quickly assemble and configure all the features needed to deliver a specific function — in this case, adding information rights management tools to a file server.
Server Manager is designed to provide one place to manage several servers, but you're going to want to drill down into a server to see how it's being configured, and to check that it's up to date and functioning normally. Important diagnostic information is always surfaced in the top level of Server Manager, but it's useful to get a fuller picture.