Twan Grotenhuis (MCT, MCSE NT4, 2000 and 2003, MCSE+messaging 2000 and 2003, MCSE+security 2000 and 2003, CCNA) is a consultant with Sylis Netherlands. He currently provides strategic and technical consulting to several customers of Sylis in the Netherlands. His specialties include Microsoft Exchange and ISA architecture, design, implementation, troubleshooting, and optimization. Twan has been involved in several major Exchange implementation and migration projects where designing the new messaging infrastructure was his main focus.
Twan wrote Chapter 11.