Guido Grillenmeier works as a Senior Consultant within the Enterprise Microsoft Services Organization at Hewlett Packard. Based in Germany, Guido joined HP in 1996 and has been working with directories since the early days of Windows NT. Today, he deals primarily with global Windows 2000 deployments and migrations, designing and implementing efficient Active Directory security and delegation models for HP's customers. Guido has been a speaker at Microsoft Exchange and IT-Forum conferences as well as the Directory Experts conferences hosted by NetPro