XS4ALL is a leading Internet service provider in the Netherlands with more than 400,000 customers and 300 employees. It provides high-speed Internet access and a range of hosting solutions. After evaluating several possible software solutions, XS4ALL chose Windows Server 2008 with Hyper-V technology and Microsoft System Center Virtual Machine Manager 2008 to help virtualize servers in its data centers. XS4ALL currently has Hyper-V running on high-availability and stand-alone configurations. IT staff members use System Center Virtual Machine Manager 2008 to move and migrate servers between different clusters and stand-alone servers and to perform physical-to-virtual (P2V) conversions. The company's goal is to eventually virtualize 100 percent of its Windows-based servers. XS4ALL has been able to cut costs, simplify server administration, and increase its ability to provide new products and services to customers.