The Apache DS plugin is a new plugin of Apache Directory Studio that lets you start one (or more) instances of Apache DS (Apache Directory Server) within Apache Directory Studio, or/and Eclipse.
First, let's open the Servers view of the Apache DS plugin.
To do so, go to Window > Show View > Other...:
Open the Apache DS category, select the "Servers" view and click Ok:
Now let's create a new server.
To do so, use the "New Server" action in the view's toolbar:
Give the server a name and click Finish: