Brian Svidergol specializes in Microsoft infrastructure and cloud-based solutions around Windows, Active Directory, Microsoft Exchange, System Center, virtualization, and MDOP. He holds the MCT, MCITP (EA), MCITP (VA), MCITP (Exchange 2010), and several other Microsoft and industry certifications. Brian authored Microsoft Official Curriculum (MOC) course 6426C - Configuring and Troubleshooting Identity and Access Solutions with Windows Server 2008 Active Directory. He has also worked on Microsoft certification exam development and related training content for several years. When he isn't working on technology projects, he enjoys family time, basketball, and gaming. Robbie Allen is a technical leader at Cisco Systems, where he has been involved in the deployment of Active Directory, DNS, DHCP, and several network management solutions. Robbie was named a Windows Server MVP in 2004 and 2005 for his contributions to the Windows community and the publication of several popular O'Reilly books. Robbie is currently studying at MIT in its system design and management program. For more information, see Robbie's web site at www.rallenhome.com.