Most IT departments have multiple administrators to manage the domain, these admins may need access to servers at the same time, this is an issue as out of the box server 2008 will only allow one remote connection to server 2008 at a time. Follow the guide below on how to allow multiple administrators to connect to server 2008.
This is very simple to do. Follow the step by step guide below
Click Start, All Programs, Administrative Tools,
Select Remote Desktop Services > Remote Desktop Session Host Configuration.
Right click in the Edit Settings box
click on properties and uncheck the box next to Restrict each user to a single session.