You can install OS X Lion Server as an upgrade to an existing OS X Lion client, or you can purchase it along with the OS X Lion client and install them both in one fell swoop, using the Customize button found on the first screen of the Lion install process.
In this case, I'm using the upgrade to an existing OS X Lion client option, as I imagine this will be the path most users will take when they decide to add Lion Server to their networks.
What We'll Cover in the Installing OS X Lion Server Guide
This guide will give you detailed instructions on how to purchase and install OS X Lion Server as an upgrade to OS X Lion. We will even take a quick look at the Server admin tool that's included with the OS X Lion Server upgrade.
What we won't cover here are detailed instructions on using the Lion Server admin tool; we also won't configure any of the Lion Server services. But don't worry; we'll cover those items in their own guides.
By breaking the Lion Server guides up, you won't have as many pages to read through when you're only interested in perhaps one or two of the available services. Also by breaking the guides up, we can give each service that Lion Server provides more in-depth coverage.
With that out of the way, let's get started on installing OS X Lion Server.