With the current economic conditions, companies have been trying to do more with less by recycling old hardware and utilizing open source software. That's also true where I work. Between our call center, finance, distribution, warehouse, and sales departments over 50% of the company's employees are running on RHEL4 LTSP thin clients. Recently it was decided to update our LTSP environment from RHEL4 to Ubuntu 10.04 with LTSPv5. Using the following steps, I was able to set up and integrate an Ubuntu 10.04 LTSPv5 server into a Windows 2008 Active Directory domain.